Here's a wierd one: several of my posts have received the tag of "Nora Roberts" without me setting that as a tag, and the posts have absolutely nothing to do with Nora Roberts, whoever that is.
On my blog, the tags show as I set them. If you look up my most recent one on looking at the Photography tag, though, you will see Nora Roberts there as one of the tags. And if you search the tag Nora Roberts, several of my posts as well as others are there.
? Very strange...