Ashley, (I think this should go into Bugs Now...)
I noticed as I was playing with the CAPX above, that the primary Sprite that I deleted at startup is still being picked up by the paste into canvas event somehow. You can see it when you change the for/Next from 50 to 1 (make only one star per for-next loop) for the Sprite creating. Move the sprite to the middle of the viewable space and make it bigger. There will be 2 stars in the upper left box! Then an extra 2 compounded every box after that! Ugh!
I am deleting the sprite in the very beginning. Is the delete not being called until the end of the event list every tick?
(This is in addition to the Canvas Not destroying the previous pasted items)... This may be a Canvas Issue, but I thought I would throw into your court too.