AK Guy,
Are you aware that the throw from the english combines with the collision induced throw? They add together. While outside english throw & the collision induced throw are at odds with each other. For those reasons it takes LESS inside english to throw (push forward) an object ball than it does for outside english to throw (pull backward) an object ball equal amounts. Said another way, to get the same amount of NET throw in both directions requires different amounts of spin for each direction.
If you are missing 'long' on many of your inside english shots, remembering that collision induced throw might help. The right amount of outside english can & merely negates the collision throw. it takes more to throw it farther back (pull it back).
If you are already aware of the above then i would perhaps suggest playing nearly a full session of 'practice' hitting every shot with inside english & then finish with a few racks playing normally. if you do that a few times, I think your inside english play will improve.
Good luck with finding your solution.
Best Wishes,
Rick
PS Are you playing with a regular shaft or a 'low deflection' shaft? Do you use a pivot method to apply english or are you doing a 'parallel' shift? I might be able to give you some insight on those.