I don't mean to sound judgemental, so please don't take it that way, but may I suggest that perhaps you rushed things a bit? When I got Riggs, he didn't meet Ruby for weeks. I didn't want to chance a problem and end up with three dogs on c-n-r right form the start.
If you really like him, may I suggest you give the dogs more time, but time apart. Let them get used to each other's smells, sounds, etc.
I'm not saying that the problems will go away, but it might help even things out.
Just a thought.
Inside me is a thin woman trying to get out. I usually shut the bitch up with a martini.