The total rounds markets is an overs/unders style market. For the purposes of settlement where a half round is stated then 2 minutes 30 seconds of the respective round will define the half to determine under or over.

If the fight is stopped at exactly 2 minutes and 30 seconds of the designated round, bets on this market will be void.

For example, if you have a bet on Michael Chiesa vs Kevin Holland for Over 2.5 rounds, and the submission was R2 02:39, then markets will be winnings bets as 2:30 is the half round.