That sucks man, the AMA is so retarded, should be like old day where you could show up and enter.
I have a story about that in 2006 I wasnt planning on racing St. Louis SX and my buddy was in the 250f class, well when the list came out they entered him in the 450 class and he freaked out, and they told him they wouldnt change it, so I called them and was like can I take his spot, cause he wasnt going ot get his money back so would have been free entry for me, haha, but they were like NO we cant do that, they never gave me a reason why, but his dad called them up and snapped and got them to switch him to the lites class, and we ended up going down with him to help out and watch anyway.
But shit like that with the AMA is just dumb, they just lost $200 buck for Budds I know that, they should totally let him race but oh well, guess they dont care?