I'm not sure if this is a glitch, or the way it's supposed to work, but when I tile a group, if I want to move the tile to a different area (for example, to optimize what part of the design shows up on the in situ images), everything goes all wonky, and gets all misaligned. I'm working on wrapping paper, with a "frame" png, and several photos beneath it for the customer to replace. It looks best in a 12" tile size, but unfortunately, the seam doesn't match up, so I was trying to move the whole tile around to see if that would make it line up. I can nudge it a little bit, but any more than that, and everything gets misaligned. I'm working on the horizontal view, so that I can use a half-drop repeat.
