This is something that has happend to me numerous times. I like to think of it as the spirits playing games with me, or tricks on me. In which it will seem something has vannished into thin air.
I will be looking for something and I will be certain where the last place I put it was, and yet it will not be there, and then of course I begin to doubt myself becasue I am standing there staring at the empty space, so I will think of all the other possible places it could be or I might have put it and end up looking everywhere, and I know for a fact I had not brought it out of the house and yet it is nowhere to be find. And I get frustrated and end up looking back again in the first place I looked and there it will be sitting right in plain sight where there is no possible way I could have not seen it the first time I looked there.