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Added some stuff to my previous answer while you typed yours :)
I hadn't realized this was the problem, I thought the gears changes were fine but @frank9755 couldn't get the 11T sprocket due to not having gear changes left, while having one "extra" gear change on the leftmost side of the cassette.
Veblen-
Yes that is the problem. I can't get the 11T and have an extra sprocket because there is something wrong with my mech.
It's not the hanger or the frame, or even the Wolf Tooth, as @hippy's spare mech gets all the gears when we put it on my bike.
Back in November I was riding along and got a weed caught in my chain. It went into the mech and pulled it hard, like an anchor, so the hanger snapped in half. Most likely it bent part of the mech. I had already replaced the plates as I thought they might be bent. It could be aonther part of the mech that is bent (but the old cage was hardly bent if at all and probably would have been mangled if it had been tweaked hard enought to bend another part of the mech, so maybe not?), or I might not have fitted the new plates right, or it could be the mech's software, or something else. But none of those seem to be fixable - by me at least, so I'll just get a new one.
frank9755
You can only move the RD x clicks left of any cog and x clicks right of any cog. So the cog you start the adjustment doesn't really matter if you've got to max adjustment and it still won't get the next gear because the RD is bent.