I think you'll find that's called serendipity....I have sneaking suspicion the developer had already been working on it for a while and it was just fortuitous timing
Is it possible that you are using the cursor keys or mouse pointer to go back and edit text after the tag and then continuing to type after the tag but inadvertently finding that you are typing from within it?Oh and Brogan by chance if you look at my post number 10 above tagging geth, you will see an example of where the tag link has been joined to the sentence as we discussed on another thread so maybe you can dissect it and see what was going on....