policy committee

I got elected for Representative position for my daughters school's parent committee.
The other positions no on wanted to accept. and people were practically bullied/guilted into taking the positions. So by the time they needed a Representative I volunteered so we didn't have to be there all day trying to find someone for the position. and I was trying to step out of my comfort zone.
For this position you have to attend MANDATORY training. its for 2 days. 9am to 2:30 pm. When I got there I was the only parent from my site to show up. as in not just for the Pm class (which my daughter is in) but also for the Am class. these are also multiple classes for each time am/pm. so that pretty bad. out of about  8 classes I was the only parent to show up. I was elected but so was another woman as a alt, in case I'm unable to attend a policy meeting. a rep has to attend these meetings and record what decisions are made then take this info to the parent meetings. basically I actually have more responsibility then the president of the parent meeting. I vote on things that effect everyone then I tell everyone what decisions have been made that effect them. anyway when I pick my daughter up i see the Alt and let her know to come to the last training day. cause the coordinator of the training said if you see the other people that are supposed to be here tell them to come. i tell her to come. and she tells me i thought you were replaced cause they were talking about replacing you. well no one told me that! and no on was at the MANDATORY training. so if they wanted to replace me they needed to be professional and have a replacement and have that replacement be where they are supposed to be. so out of this whole situation i'm the only one being responsible and yet they are talking about replacing me!?