muller

So I have this dress shirt. Nothing out of the ordinary. It's got an interesting pattern on it so it's easily distinguishable.

So the other night I'm outside and I need to help my neighbor bring in our shared garbage dumpster from the street. I take the shirt off (hello ladies) and bring the dumpster in. I can swear that I brought the shirt in and washed it. Well two days later i come home and the shirt is hanging over my front yard fence, right where I had left it that night. In a fit of stonerdom I curse myself for leaving it out for two days. I bring it inside and wash it. As i'm putting it away I notice that the shirt is larger than I remembered. I look at the tag and it's a full size larger than I wear. I go to my closet, and there it is. My dress shirt.

Through some twist of chance, the exact same shirt minus the size was hanging in the exact same location as my shirt the day before.

I have a couple of questions about this:

1) What are the chances?
2) Who's shirt is it if not mine?
3) What is my future self trying to tell me without disclosing myself/himself?