Strange Occurrences in A106

Last night, the group went to Dave and Buster's, and when I left, everything was normal, but when I came back to my room...I thought everything was normal, but then I went in to the bathroom. The toilet seat was up! Don't get that one... I don't think they clean at night, and I certainly did not put the toilet seat anywhere new. I locked my door when I went to sleep last night-- latch and dead bolt.