On the battlefield at Monacacy

My wife and I are reenactors. At a Gettysburg event we found ourselves staying at the Holiday Inn in Frederick MD (not a bad place to stay if you are researching a unit that had been in Frederick a number of times during the war). This hotel sets right in the middle of the Battlefield at Monacacy, the battle that saved Washington DC.
That night, as she laid our her reenacting gear, which included a number of authentic civil-war period jewelry pieces, I gave her a watch and fob with a key as a gift.
Neither of us knew how to place the key on the fob, so she put it on loosely so it would move along the chain. Then she laid the watch and fob beside a piece of jewelry (called a Prince Edward brooch) containing hair from the period, and we went to sleep.
The next morning, as we dressed to head to the reenactment, she started putting on her jewelry. At that point, she asked if I had messed with her stuff during the night. I said, no, I had been asleep, but why?
She held her watch fob up for my inspection. The key had been moved, and was now locked into place next to the watch. I asked if she had moved the key and she told me, in no uncertain terms, that she had not.
We pondered this for quite a while and while at the event stopped to visit our friend, a sutler who deals in antiques (she has sold us most of what my wife has) and she told us the way the key was attached was correct. When we asked if the way it had been previously was wrong, she said definitely.
So who moved the key? I assume that as the Holiday Inn sets on the middle of a battlefield, in a town that had been occupied by Confederate troops a number of times, someone who still remains in the area had determined to make what was wrong right.
Is there any other explanation?

regards
oldreb