How many missions are there?

So I’ve completed every single quest in BL2 on the handsome collection on UVHM and there are 7 quests that can be done over and over again, without any chance of them ever having a check mark next to them. I don’t think anyone is interested in seeing these quests appearing as “failed” or “undiscovered” or “ignored” even though they’ve already been completed.

The Magic of Childhood
Tier 3 Rematch: Twelve O’clock High
Tier 3 Rematch: The Death Race
Tier 3 Rematch: Appetite for Destruction
Tier 3 Rematch: Bar Room Blitz
More History of Simulated Violence
Magic Slaughter: Badass Round

I think I counted 260 completed missions + these 7 for a total of 267. Is there 267 total missions?

I’m OP6 and would like to get to OP8 but need some help. Please post GT if you are OP8 and able to help. I have some great OP8 gear to trade.