TJ's Fight on TUF.... 3 Rounds?

Why was the fight 3 rounds instead of 2?

I thought if any of the fights on TUF are 3 rounds, then its considered a "legitimate" fight by the Athletic Commission, and it's counted on your record?

To my knowledge the semi-finals are always three rounds but considered an exhibition match. Then again my knowledge could be totally flawed. Phone Post

For the semi finals it might be 3 but usually if the rounds are 1-1 then they go to the 3rd for a tie breakers Phone Post

Semi's are 3 rounders.

What's the rules and regulation for considering it an "exhibition" match instead of legitimate fight that counts towards your record?