my exs attorney has had the hearing postponed twice because of scheduling conflicts.
It's pretty common for our ex's attorneys to use little things like scheduling conflicts to stonewall and obstruct. You might want to find out if your attorney has to agree to these extensions... .if so, then tell him that going forward, he cannot grant any extensions. In normal cases, it is courtesy for lawyers to give extensions, but for our cases, it can be part of a strategy to grant the disordered parent a free pass, even if it's only for a short period of time.
Have you read anything about parental alienation? If not, it might be a good time to check into it. If nothing else, prepare for your daughter to interpret things in a distorted way. If she is vulnerable to what her mom says and thinks, even if it's to compensate for all those years, she will align with mom, temporarily at least.
If you think she was hurt that you didn't take her side, prepare to address this in a way that does not justify, argue, defend, or explain -- JADE. This tends to feel invalidating to someone who is emotionally aroused, which your daughter might be after spending time with her mom, and who knows what mom is saying. It might be better to say, "I know I hurt your feelings, I didn't take your side in that argument. I can see how you would feel that way. You and I have been a team for a really long time, and GF is new. It probably felt like a betrayal. How are you feeling now about it?"
That's validation of her feelings, which just acknowledges how she felt. It can help re-create a bond with her.
It's an easy skill to read about, and harder to deploy. Mostly because our emotions get flooded and things move quickly, making it easy to slip back into JADE.