Stephanie,
What we do is make a backup copy of the axf before checking it in so that if there is a failure, you can delete whatever features checked in (if any) and then redo the check-in with the backup axf. I realize this already happened to you so this doesn't solve your immediate problem but something to think about going forward...
Also, it takes a few hours for the post-processing files to post online for NOAA. If you try to post-process your data before the files are available it will fail, but if you try it again after the files have been posted, it will work. I'm able to go into the ftp sites of the base stations I use and figure out more or less when my files will be available.
Kerry