Is there a way to remove the time offset on every note in a midi recording?

I tried quantizing already but that didnt work. I have a full guitar melody recorded for a 5 minute piece that I played from the piano, and just tried putting it through Strum Acoustic Session and none of the notes that are too offset will play.
 
I dont want to have to go through everysingle note to remove the time offset :x

When I tried quantizing, the notes didnt move, maybe because the off notes were too far from the centre?
 
I originally recorded the audio with my piano's guitar sound, but just spent a while making a much more ideal sound in strum acoustic session, but it wont play the notes that have too much offset due to my sloppy recording.

Hey Vab, can you update your footer when you get a chance ("User control panel" at the top of this page and then the "Signature and comment" on the left). I know you have mentioned in other posts, but my memory is not that good.
 
Are you saying that MIDI notes are not playing in #3?? Even if "offset too much" they should still play, so I am trying to understand your post (it seems you have two issues going?). Can you clarify what you mean my "won't play" please?
 
As Dave pointed out, you can nudge all of the notes if offset by a common amount. Brundlefly also made some nice offset tips recently in a looping thread (will see if I can find after I post this).

I have not used the Strum Acoustic Session enough to speak to it, but just opened it and played with it for a bit.
 
The offset didn't make sense, because that is how you get the effective sound of a real strum. I put in a few chords and offset notes all over and they played fine.
 
However, I did see what you are describing when notes overlapped (i.e. a note is still ringing and hit again). If you move the now time back onto the ringing notes and start playback, the second notes strum fine (since the first are not ringing). I have not been able to find a way to rectify this other than to make them not overlap.

Yes I had the track selected to quantize.
 
Also my midi tracks keep getting locked and the notes cant be edited when I copy paste them, which is frustrating me.

darn hammer ons!!! always softer than the original note... play less legatto! you can check the box for quantizing the release as well to prevent overlap. Also, if you insert the quantize effect, you can adjust the offset setting inside the quantize dialog box. Try -30 or or so if using the strumming keys for for an on top of the beat strumming effect. depending on sample latency, i adjust the quantize offset. staccatto strings may need the quantize offset set ahead even more when quantizing. whatever the sample needs in order to achieve correct timing in the end.

After you've recorded your MIDI track, go into each clip's properties and edit the start time to just a little earlier..  I've even bounced the whole MIDI track into one clip then slid the whole thing... just in case I need to 'undo' the offset to make edits (easlier to change one clip than lots of clips).