You're not making any sense.
If you try a two-point conversion earlier, you actually allow the possibility of trying ANOTHER two-point conversion later, and winning the game in regulation, rather than just playing for a tie. If you kick earlier, you eliminate this possibility, and the best you can hope for is overtime. This is an OBVIOUS advantage of going for two earlier.
But that's not even the comparison we've been making all along in this thread. We've been debating whether to (a) go for two early, then kick an extra point later (if you're still down by 7) or try to score twice and win in regulation (if you're still down by 9)... or (b) kick an extra point early, then (down by 8) go for two later (which, if you fail, you lose the game). You're EITHER going for two early, or later, not both times. If you kick the extra point earlier, you didn't even TRY a two-point conversion the first time, so when you try it after your later TD, you're trying it for the first time. There is no "first time" and "next time" for the two-point conversion. There's either "early try" or "late try".
Do you actually believe that if you kick an XP after your first TD, then try a two-point conversion (for the first time) after your second TD, that you have a better chance of succeeding on the two-point conversion than if you tried it after the first TD?!
...dbs