Stuck in combat and general combat in GB

Hi, few more questions that arent too obvious to me. I only ran HB for the first time a few hours ago, so bear with me please.

I made my own GB profile using my own routes. At one point I got into a fight, there were enemies nearby and at that spot I was still in combat when all the closest were killed. GB sat there, I moved and then it immediately went onto my mount when I came out of combat. So I guess that all the time it was trying to mount but couldnt. Is there anyway to avoid this?

When using talented are there any specific setups you should have for your class? I see a part that has a list of and was wondering if I should set accordingly. Can I choose what is used to fight with?