Ok, so I am a werewolf and I have Beast blood as an active effect.....100% resistance to diseases. So my question is why do I keep getting rockjoint...a disease from wolves and bears? Just curious if anyone else is having this issue?

You shouldn't get that. I didn't, but then again, I fight very little against wolves and bear. You sure it's only those two that are giving you that disease? Because if a skeever doesn't, and they do, it's maybe something you only get from 'similar animals'.

Because the 100% disease protection is actually not 100%. Any single resistance stat can only grant 80% or something close to that regardless of what it says. It's by design, but also lame. If you want 100% you need two stats to grant it.