Hmmm. that's quite perplexing since the <TITLE> tags should be in the <HEAD> part of the document, not the <BODY> part... so what it's doing isn't even correct.
And by default, Dreamweaver isn't supposed to automatically rewrite any file with the .asp, .php, or .cfm names.
Perhaps your preferences for rewriting files became tainted (I'm completely guessing here

) - try going to Edit -> Preferences -> HTML rewriting.
Let us know if you figure it out!
hth-
-Elizabeth