aha think i know why he regrabbed it, might be not realizing something but still heres link. http://www.geocaching.com/track/details.aspx?guid=16ec9913-24cd-4e75-878d-4d70eb3c69fd
after posting and then dawning on me, why i think its as he never got back in time to replaced it before me, as i was quicker. my bad sorry