Why is Copy, Paste, Paste Special not working?

I had to use Copy Special to make it Paste Special, so ok. BUT: I have it set to paste in track 84, but it pastes in track 85 (creates new track). First time I used undo, did it again and it pasted in 84, but now it continues create new track, even through it set to Paste to 84, not "New". Paste was always broken, not realizing how much it broken until actually using it and working under the deadline.

I don't know if I know what I am talking about here but this copy paste in PRV mode issue has reared its ugly head more than once for me.  One thing I did ascertain is that if I paste and don't see the data on the track that I thought I was pasting to, I hit CNTL Z immediately to undo the paste to no where.  I think that this has created the double note issue for many a user over time.  The CNTL Z defense has stopped my double note issue in its tracks (no pun intended).
 
But, I find that if I do a SAVE of the project and then try the copy paste that it then starts to work 75% of the time (or so)..... if it still doesn't paste after the save, I exit SPLAT and re start it and then do the copy paste which seems to work 100% of the time.
 
Is this a bug?  I think so but I can't make it happen, it just starts on its own and once it goes bad, it stays bad until I do one or more of the above actions to get it to work again.  
 
Quite a nuisance, but since I can't replicate it, I can't blame the bakers.  But it does make me think, don't the bakers use SPLAT themselves so they to can run into this problem?
 
Hopefully, this will help you.