I was in the same boat. I tried bunch of times with san jose ASC. They were crazy. Don't even want to listen if i have valid reason. I went to Oakland ASC and got it done.
This was bound to happen as everyone was unnecessarily taking advantage of their (San Jose ASC) leniency even though getting FP done a week or two earlier wasn't going to help them in getting naturalization done any earlier. But this has screwed up those who have a genuine reason to get the FP done a day or two earlier. Earlier, one could easily walk in for early FP, but now the gates for that apparently seem to be closed.
An acquaintance of mine had to resort to the official procedure to get FP postponed because of this. As her only brother's wedding coincided with her FP date, there was no way she could've kept that date.