Is it supposed to wrap around the corner post? Or should it have tension bars. (Second photo to show a corner done with tension bars)

I got my fence done today by a company and one post is done with tension bars but two are done with it wrapped around.

Previous owner special. Rotten to bits. What kind of bracket do I use with the anchor bolt so that I wont need to cut my posts? The single bolt seems like even with adapters it wouldnt be the best for structural integrity... am I better off sinking posts traditionally?

I got my holes for 42 in deep with 10 ft post and the holes are about 2/3 full of concrete. I'm going to pack some clay around them now. I was wondering if maybe I should spray them with Flex Seal to help protect them.

The old offense posts I pulled out we're in pretty great shape but they were from 2000 and I've heard they stopped treating Lumber the way they did in 2003 because it was toxic and it lasted longer cuz it was a better treatment for gum contact.

Just never seen something like this lol