I don't know the woman myself, I don't know the situation.I wasn't there.It could possibly have been that she was flustered having the baby with her at work for the first time,having to use the desk to change her/him and it may not have even registered to her that that bin wasn't the one she may have at home by her change table.I don't know.

I am fairly certain the OP said she was visiting with her new baby, not working.......