Finished companions quest and workibg on vampire/dawnguard quests with lydia. I go to the companions forge to upgrade my ancient 2 handed sword to hero. He runs up to me with quest dialogue and follows me around town?

Pay off all of your bounties.

Its affects hom and his side quests?

What?

This is a known bug, the solution is pay off all your bounties.

Thanks. I did get a whiterun bounty so that explains it.