loosey
Tyson,
No need to worry about it. It's of no concern when your pic is complete, and does not hamper the quality. Some formats will allow you to keep bits and pieces of your pic. If you have made a mosaic/collage etc, then you can re-edit the pic to move the pieces around again should you wish. With JPG, this "mosaic" format is not supported, so saving as JPG will just join the bits and pieces of your mosic/overlays into one image, and no allow you to break it up again. That's all.