I'm having problems with certain side quests. When I finish them, they start all over again and again and again. Am I doing something
wrong or is this normal? I'm at leven 59 and playing the pc version of this wonderful gam.

It happens. It's the Radiant AI bug. Hopefully they'll patch it in the next patch. This even happens when you have 20 other quest that haven't been done remaining in the pool.

i know what you mean...ive done the red eagle sword quest 5x now and still get the quest if i read the book..so i dont read it anymore

I got the red eagle quest twice too. Do you get the sword again?