Click on your name and then on the "statistics" tab. That will show you everything you have posted. Another way is to click on "New Posts" at the top.
Usually posts are moved if they are originally posted in the wrong section. Some of the sections have very specific rules about the focus of the section and will move threads that don't fall into that category to another section that's more appropriate. If someone posted random information that's not even poly related in "Poly Relationship Corner", the moderators would likely move it to "Fireplace" or such.