u/Future-Drawer-5457

I’m currently at 5 charge cards for amex and 4 credit cards. I had 5 but canceled one last week which is the delta plat. I’m trying to apply again for my 5th card which is the hilton aspire today but got rejected for max out of the number of cards. Is it possible because I have another authorized user hilton card? Or that I need to wait longer for the system to reset? Do authorized user cards count at all toward the max you can have?