Hello,

I can't find an answer to this anywhere in the manual, and a friend of mine who is also playing says he never ran into it.

When one of my soldiers gains a level, I am finding that certain special abilities are not able to be selected, even if I am at that point in the tree. I can move to other trees and select other abilities, but no matter how many times I clock on the next one i the tree, it won't give it to me. Is this a bug? Or is there a certain level requirement for certain abilities?
I have noticed the incident with several characters and several skill trees. I just wanna find out if this is normal or not before continuing my game. Thanks.

I presume you know that some perks require you to have followed multiple branches. Check the perks that are not available for selection and see how many lines lead to them, and if you have all the prereq perks.

Regretably, that doesn't seem ot be the problem here.

Its not letting me click on such skills as Longer Short Burst for soldiers and Increased Familiarity for engineers, both abilities which have only one line leading ot them. The skill is highlihted, as though it is ready for clicking, but I can't actually click on it, though it does let me pick other skills in other trees.

Try choosing perks when you are not in battle. I've noticed you can't pick new perks when you are sniping someone.