I am so sorry you are going through this Michelle. I think your H's change of attitude is directly related to pressure from TAP. Don't let him bully you into anything. He can't even fill out the forms correctly!!! He will probably blame you for that too!
You sound like you are more into the anger stage today rather than the sad stage....which I think could be a good thing right now.
I can't believe he would miss his sister's graduation because you are going to be there. He continues to make bad choices and eventually he will see that HE is the cause of his problems.