This question already has an answer here:
Recently I migrated my account on Minecraft.net. I had two worlds/saves before migration called 'Exile' and 'TEST world'.
A little after I migrated, I deleted 'Exile' and 'TEST world', and started a new world/save called 'Village on the Green'. Today, I went in my saves to check out my files for ADMIST related purposes. 'Village on the Green' wasn't in the saves, but my old maps 'Exile' and 'TEST' world were, even though I had deleted them.
I don't care about the latter, I think I get whats going on there. The problem is that since migration, I cannot find my current worlds/saves.
Where are they at? Is there still local content for my current worlds in a file somewhere, or does Mojang hold onto all of the data now?
4/4/2013 EDIT: Most likely location conflict.