hy Lucasmic i think I understood your problem a little i have done some fixes to that amano here is my link:
http://www.mediafire.com/download/64avd4t875za791/amano.zip
i also made him able to do opposite guard against cross up attacks
many authors ignore the command buffering but i know few of them that code with command buffering as IKARUGA
Neverthless,until now i never encountred a mugen char able to do opposite guard against cross ups like the original games:
kof,last blade,cvs...
and if you want me to help you how i done those edits I can post the code with explanation to be able to do the same on your own