She was still in her safe, comfort zone. Horses, though they sometimes get bored, dislike for their every day routine and surroundings changed in any way. People normally don't give consideration to fact that horses have emotions and feelings too. Because of these feelings they can't verbally express, they opt to act them out. This is what you've been experiencing.
Some horses make the change and settle in within a reasonable amount of time.
For some it takes quiet a bit longer. Your horse has had almost 7 months to adjust. You're still having problems and they're getting worse. Work with her and give the re-bonding a chance to work for the two of you. One more thing, I personally would not allow anyone else to rider her until you have done this and recapture her trust and she feels comfortable again.