I think the matter of performance works like this. It's darned fun to get on a piece of apparatus and show off whatever you have that'll draw a gawk or compliment. You train to keep those skills sharp, and to surround them with support skills to compose an entire routine.
Your dd's highlights in warm-ups were.......
Beam........her bhs series was well centered and in good rhythm, a great full turn, and a nice split leap-back tuck combination that if connected in rhythm would be pretty good.
Vault........Pretty good warm up vault. The coach spotting her to the extent he did is odd, and I'm drawn to to suspect this was "the good vault" that's balanced out by it's evil cousin "the bad vault".
Bars........Nice giants, and a double back dismount that looked good.
So what's happening to her when it comes time to make it count........
Beam........ After watching what seems to be her primary beam coach stand in for her layout dismount, but defers to the head coach who then spots her layout full, I can't help but "cringe" at what's in store. It's difficult enough to keep all your balance beam marbles from rolling out of control all over the place, but to have an "iffy" dismount whispering in your ear through the entire routine is like having your hands tied together in a tickle match..... it just makes it that much harder to do what you're able to do. The dismount she did at the end of her routine kinda surprised me when it went as bad as it did, but then again not so much because kids that do layout fulls usually have the round off layout down cold and don't need nor want a spot as they warm up for the full.
Vault........ It looks like the evil cousin took over as she came to the spring board, and sent her into a pre-flght that was too high to make the vault do much better than what she did. It could be a freak occurrence caused by adrenalin, or the result of an inconsistent round-off caused by trying harder to hit a good vault.
Bars......... The fall while standing up on the low bar, no big deal. The fall on her dismount is a different story. You posted two or three weeks back that she'd just stuck her bhs series for the first time in a while. In the same post there's a note......."Bars was going great until she forgot (yes forgot) to let go for dismount". I wouldn't think much if it were an isolated incident and the only mistake made all season long, or just within a two meet span, but it becomes worthy of mention when seen within the over all context. The bottom line is this dismount can be performed with unsound mechanics and look good, but it won't be consistent.
I've watched you're child's videos when you've posted links to them. I think I've seen all of those available spanning her optional years. She has obvious ability to learn some pretty neat stuff, but it just seems she's learning the hard way without enough attention to detail to bring the skills to a consistency she's capable of.
I think highly of your daughters ability, and admire your desire to help her by looking for answers and solutions. I think the best path for you is one that looks at what's happening at meets with respect to performances of all the athlete's, and let the path end at the gym, because that's where the answer can best be found. There's a saying in the gymnastics community (of coaches) that goes like this...."you compete what you train".
I wish you and your daughter the best of luck and fortune. Let me know if there's any thing i can help with.
