Sympathies for the OP, but it seems they did make a mistake by selecting the forkable option. They also discovered a big in the blocking option too.
 
While any of us who do any programming and version control probably think that forking is the ideal terminology here, it probably isn't on BandLab though. Perhaps if you select the option to make something forkable it should give a popup warning of what that means and the licensing implications and then get you to confirm that's what you want to do. You know? Just to save accidental selection.
 
I have only uploaded one track to BL and that was kept private just to send the link to someone to work a trombone solo out. So I am not that familiar with it.
 
Another friend of mine has been uploading his stuff to BL recently and he was raving to me that he got 50 new followers in one day. He then admitted to me that he had noticed that if he uploaded his stuff as forkable he got loads more followers, so that's what he's been doing. He doesn't seem to care that it means he's giving his rights up to his material. He just wants lots of followers! And yes, he's a grown adult in his 50's. Mad :)

The first thing I noticed is that chords and beat are not copywritable. You cannot copywright a chord or chord progression. Only melody and lyrics can be copywrited.
cheers

... and original arrangments and recorded performances...

https://www.legalzoom.com...how-to-copyright-music

Some People need their DRAMA. Like a DIVA. 
There 'll be no DIVA without Audience.
Jm2C
 
Cheers :) 
 

It's probably best for the OP to stay away from BandLab. It requires a fairly limited cognitive skill set, and it's hard for me for phantom how things can get to this. Then again we're living in a world with "Warning ! HOT !" on the lid of disposable coffee cups, as a result of victorious lawsuits. I understand why the EULA's these days needs to be so long winded and absurd. Looks like it isn't for nothing. 

Serious_Noize!
 
As for my music being used by someone else, it was not the fact that they used my simple chord progression, it was the fact that they took my song titled "Summer Days" and rewrote it calling it "Summer DRUNK" and used the chord progression to throw off on me personally, which I suspect it is someone I know in person/neighbors for real that I have a disagreement with some issues lately trying to agitate and irritate me. And yes, I am in the right on those issues. But legally I can't get into that here. 
 

 
I did a quick search for it, and listened. Sounds like they just cut up an intro, pasted it (badly) then 'rapped' over it (badly). I wouldn't lose any sleep over that.

 I have a lot of issues with Bandlab myself, I’m having difficulties figuring it out, things don’t happen like I expect them to, and quite frankly that annoys me.
 I can take the easy way out, rant on and blame it all on Bandlab, whine on about how stupid it is, and I probably would if I reacted with an angry immediate petulant response, like ummm,, “HEY!! I’m and AMERICAN, I KNOW MY RIGHTS!” and just blow if off and go look for something or someone else to be pissed off at…….. But I don’t that way…
I stepped back and let my frustrations subside, thought about it for a while in a different perspective, stepped back again and mentally looked at it from a different angle, and a crazy new theory popped into my brain like an epiphany.
And that completely because I don’t fully understand how to use it yet, instant gratification be damned, I have to actually take more time to learn how the good folks at Bandlab do things, and if I’m going to assume anything I should start assuming the good folks at Bandlab aren’t screwing me up on purpose, it might just be that they don’t know how Steev works..
 For instance, a few weeks ago Pheonx1x uploaded his “It Was All In A Dream” project and invited me to join, I had no problem downloading it from Bandlab and importing all the tracks into “Cakewalk by Bandlab” for my first test drive..
 It was pretty uneventful in respect to my new Cakewalk DAW being new and exciting, it’s essentially the same freak’in thing as my SONAR Platinum!!
 But I guess I didn’t remain disappointed very long, because that made it so much easier to dive right in with my “Mix Engineer Hat on”, which is a very different process, approach and mindset from my “It Was All In A Dream” Hat.”  
Being Pete Jorgenson already took the time to record “It Was All In A Dream” and graciously share it with me,  I was able quickly get down dial in a new edit  mix of ““It Was All In A Dream” and give it a different sound scape and texture in composition without offending or detracting from  the original idea, before even attempting to put my Recording Engineer cap on and add to it.
 And OK so far so good.. Except my problems started when I try to go back and upload my updates to the original mix
 They are making such an effort to please as many people as they can, they are completely ignorant of my much superior way of thinking that they don’t realize that they are doing everything wrong..
 Or, it’s the other way around, BANDLAB  has a superior way of thinking, and it is ME  who is having difficulties because I am doing everything wrong..
 Huummph, IMAGINE THAT? I am not the genius I thought I was! I can no longer figure out how to use things simply by giving them a quick glimpse and nod.
 I’ll have to do the dirty, maybe even start on page one, and or at least read some of the directions on how to use Bandlab.
I had made a lot of changes micro edits through out the mix re EQing tracks, applying FX for dynamic expression, all kinds of mix engineering crap thinking it would be easy to transfer it all back to Bandlab
But in the meantime, I wasn’t ignoring the invite, I’m just stumbling around a bit, and here’s a stereo mix down my  take on It Was All In A dream which DID NOT get forked or linked back to the original Pheonx1x  project or page.
Hopefully soon I’LL FIGURE OUT  how to use Bandlab the right way instead of blaming them for my own ignorance.
 
https://www.bandlab.com/steveschreiber
BTW, all my stuff here is works in progress, feel free to download, jam, bend, spindle, and militate it, and above all HAVE FUN making it your own!
If you can do that than maybe someday in the near future we can collaborate. I’m not going to waste any time worrying about anyone steeling my secret sauces and inner brilliance, and or copyrights from me, because in reality, they can’t. I’m giving them away for free, LoL.
 Just like in reality, looking at it from a different perspective and angles, anybody who doesn’t take Meng and Bandlab’s extremely generous offers and services is in theory only steeling from themselves.