Wow, I have never heard of the term DOP, but I have experienced it.
My family was living in a house in New Mexico, where quite a few odd, unexplainable things happened. But the DOP thing that happened, always confused
me the most. I can't think of any rational explanation for it at all.
Anyway, what happened is, one day, while waiting for the bus to pick my sister and me up, I noticed her bracelet and complimented her on it.
Ok, the school day passed and we're waiting for the bus to take us home. I then noticed she wasn't wearing her bracelet. Turns out she lost it
somewhere...
After we got home, she's upstairs watching tv when she hears the coat hangers in the closet banging around. She's scared, of course, and goes to
leave the room. But as she's leaving she sees on her dresser the same bracelet she had lost earlier.
Maybe it did slip through to another dimension, temporarily. It's as good an explanation as any, I suppose..
Good thread, btw!

It's nice knowing other people have experienced this kind of thing too.
To the OP, has anything else happened in your house, or do things just disappear?