Bug or an intended feature/ability?

So obviously with any Fallout game(Bethesda in general) it is gonna be utterly riddle with bugs.

So I have a few that I am not sure if that is intended or just low on their priority list.

The two that come to mind is the Unique Super Slegde "All-Rise", I use it just for Mutation events (or some lolz) and is it just supposed to be always at like 30%-40% durability?

I have repaired it to full several times and low and behold, like 5 minutes later or a few skull cracks later it is back to like 30%. Is this intentional as a balance thing for it?

And then with VATS and firing. For as long as I can remember, I have frequent issues of having 95% Hit, I fire, I see damage number pop on the foe and then there is no actual damage done. Sometimes this can happen 5-10 times in a row.

This might be cause I use a Sniper Rifle? Maybe it is a bug/insect thing, I see it happen a lot with Bloatflies and such.

Thanks for any insights, folks!