Whenever I try to set an NPC disposition to 100 with the console, they usually fall short at 90-95.. why is this? It wouldnt be a problem but I'm using the follow me mod which allows me to recruit any NPC providing their disposition is 100.

If I dont get a lower disposition than intended, I'll get a freeze and CTD. Is there any way to reliably get an NPC's disposition to 100 (with console)?