@KyleAnthony ... did you go back over your round and find any other things that stood out? Specifically, did you do anything stupid?
Here's what I mean: I go back over my bad tournament rounds, and I can always find a few times where I forgot to "take my medicine." For example, after a bad drive, I try to hook one around a tree to get to the green, put myself in a worse position, and now, at best I'm looking at double. Sometimes, I even compound that one by doing something even stupider, and end up with a triple or higher. Another stupid thing is to get cute and try to make par by getting up and down over a bunker to a tucked pin, dump it in the bunker, and make double or worse. The smart play is to just get the dang thing on the green and try to 2-putt for bogey, and who knows, maybe you'll get lucky and make a putt.
You'll realize that to win a tournament, you'll likely have to have a really good day. The winner of my group is frequently shooting the same score (or sometimes even better) as the 4-8 guys, however, its usually a quick dropoff after that. Same with your flight. The winner will probably frequently by down in the low 80's, but it rises fast from there. If you avoid big numbers, just play bogey golf and throw in a couple of pars, you can frequently finish near the top. Sometimes all you have to do is avoid dumb mistakes.
Also, don't forget that you played a nice course, with some really tricky pins**, that you'd never played before.
**You must have noticed that they put most all of the pins in the trickiest spots, right? Think of the two par 3's with water (15 and 5); they put both pins down on the low tier by the water. If you don't try the risky shot by going at the pin, you will HAVE to make, at best, a 12 footer coming back up for par. There is no way to get the ball close on your first putt from those top tiers. I 3-putted both of those holes from the top tier, but didn't mind it too much, because the way I was striking the ball, had I tried to go for the pin, I'd have likely stuck a couple into the water.