There are loads of posts about bar chords but this one is a specific problem.
So I can bar all strings on each fret without any trouble, not even much pressure, even without using my thumb on the back. I do this by positioning my barring finger as close to the fret below as possible then rotate my barring finger toward the neck so the edge of my finger is the contact point.
The piece I am learning has a B7sus2 with F# BASS chord which is as follows:
I bar the 2nd fret then have one finger on Fret 5 on the second string and one finger on Fret 4 on the fourth string
I bar the second fret with my forefinger no problem but now when I try and add my other fingers so one finger is on Fret 5 on the second string and one finger is on Fret 4 on the fourth string and then I lose my bar because as I move my little/pinkie finger to reach the fifth fret I can no longer roll my barring finger towards the neck. Other bar chords like E shape and A shape I have no problem with.