record on new track while playing other tracks

Welcome to the forum!
Asking a technical question you should always include your PC and soundcard specs. Add them to your footer like most here have done. Then you don't need to rewrite them every time you ask something. Otherwise it's hard to start guessing.
The most common cause of what you described is that your soundcard has "What you hear" or "Stereo mix" setting active. That leads to recording all outputs.

thank you for the tips, I will put it in my signature later.
 
MC6
Windows 8
Intel Core i5-4670K 3.4GHz
8GB Ram
VMPK ( Virtual Midi Piano Keyboard)
 
what else do I need?  I dont have a sound card, so its whatever is integrated with my CPU.  Maybe the AMD High Definition Audio Device?  Im guessing my video card doesnt matter.  I also dont have any peripherals at the moment.  I plan on getting a midi keyboard soon.  Right now I am just using a virtual keyboard simulated through my computer keyboard, that is what vmpk is(definitely not like a piano :P).  
 
Again, thank you both for your time!

So I found a setting called "listen to this device" which causes the sound to cascade likes its feeding back to itself.  However I already had this one off.  another one I found was "playback through this device".  After looking as some forums I found out that they took the "what u can hear" thing away.  I found a bunch of forums on how to turn it on, but then all they did was select the stereo mix as their default device.  
 
is it a problem that I am using a virtual keyboard rather then a physical one?  I plan on getting one, but I dont have it yet. 

A quick summary to clarify.
 
You seem to be recording audio to your tracks rather than Midi data.
 
The correct way to work is..
 
Insert your soft synth the way you have been doing.  Create a midi track, match the midi channel on the track to a soft synth.
Select your Virtual Midi Keyboard as the Midi input and arm the midi track to record.
Press Record and play your masterpiece.
Your midi track should now contain a whole load of note/controller information.  You can see/edit this using piano roll view.
To add a second instrument/synth, insert a NEW midi track, assign a different Midi channel (which matches either a different soft synth, or a different voice on a multi voice synth like TTS-1) and record again on the new track.
 
The TTS-1 as an example can play back up to 16 different sounds at once. So you could have 16 Midi tracks, each playing different parts, each using a different Midi channel, all sending to one copy of TTS-1.
 
TTS-1 then gives you a stereo audio output for which you have a stereo audio track alongside your midi tracks.
Of course a better way would be to use several different synths to get the sounds you want.  Each giving you their audio output which shows as channel on the screen alongside your Midi tracks.  You just point each Midi track at whatever synth you want it to play.
 
When it comes to mixing, you adjust the audio levels, NOT the Midi levels. You add any effects to the Audio channels.

Excellent, CB. That has always been a stumbling block for new users, and that "ah hah" moment is like getting the keys to a whole new world.
Setting up your tracks as Karyn described will become something you don't even think about.
And you're going to realize you want to start shopping for a MIDI controller.
I suspect that will take about 17 minutes.