I had such a hassle when I bought these guns from Cabelas (not their service though)
1. Mail order Walker wouldn't cock right
2. So I went to the store and bought a 1858 target - got it home and the sights wouldn't ajust to the POA
3. Got the 1858 - brought it home and saw the sights were crooked. Shot way left
4. They had to order another 1858 - that one wouldn't mechanically work so I didn't even bring it home
So I still have the original 1858

I'm going to try to twist the front post.
If that breaks off, I'm just going to have it dovetailed.
thanks