In the last week or so, I've come across a number of caches that either weren't where they were supposed to be, and/or were in a different spot or orientation then they were originally placed in. Just about every time the G.U.E. Magic Scroll Cache is found, I have to go and re-adjust it, because it's been replaced several inches from it's proper spot, and is much easier to spot. This makes it more likely to be muggled.
When you find a cache, make a note of how and where it is placed, and put it back in exactly the same place and position. Is this really that difficult? If you really think it should be placed somewhere other than how you found it, email the owner, and let them decide.