Am I missing something

So, it seems as though Im mising something. Working on opening the gold and souls vault. Currently at 900 skulls but by my count Ive got 24 left in Night City and 1 that wont give me credit for in normal Wicker mas Isle ( the very first normal mode) requiring 7 perfect hits. What gives? Even if I get these last 25 it takes me to 925 and the vault wont open, what could i be missing? Thanks so much..

You will earn 3 more skulls completing the gold vault. I dont know were the other 2 will be earned. Have you earned all the skulls in the other 8 skull quests?

Yes but my point is that I need 927 and the numbers dont add up apparently