[Az-Geocaching] Help! Inaccurate Coordinates & Missing Cache

[SquishyGecko]

Recently Brian from Team A.I. posted a log entry to Gecko's Urban Adventure
in which he wrote that the coordinates were approximately thirty feet off
from what I had posted on the listing.  Along with this, yesterday evening I
went venturing around checking some of my other caches, and noticed that the
coordinates, while close on some, where not so close on others.  Using a
Magellan Meridian Gold now, is there any reason at all why this would be
happening, and how do I make it stop happening?

Also, I located one of my caches with the top hanging open and everything
removed yesterday.  I recall some discussion about a pirate stealing from
caches, however I thought that individual had been stopped.  Anyone have any
thoughts on this?  For the moment I've removed the cache, temporarily
disabled it, and may put it back later.

Thanks!