Yea, I know what they are, just curious as to why they're there.

Just guessing: he's got a layout where alt_gr+t produces a small tau and is typing quite quickly hitting space+alt_gr by accident. I know that's the reason some of my k-s at the beginning of a word are ĸ-s. (you can just miss it while reading later)

OTOH, I may be completely wrong :)