Yes using the incorrect finger , as per ( learnt ) muscle memory does cause me major problems with play back. Blessed with slightly larger (average ) women’s hands, I on occasions substitute score indicated fingerings to suit my hand position.
I am not sure just what you mean in the second half of your first sentence. Would the “wrong fingers in regard to orientation “, be the fingering as suggested by the composer.
Brush over the Black keys. I have tried to find the C3 position ( ie thumb on C ,pinky on G, eyes closed ) and moved up and down the keyboard. There are two positions ( eyes closed ) where my fingers find a comfortable C position, one of course is incorrect. I feel for the EF keys, fingers 3 and 4, but a similar ‘ feel’ moves me away from the correct C position.Are you suggesting brushing over the CD black keys and not using the EF space keys for my positioning.
Is it any wonder with all good intentions, my eyes drop from the sheet to the keyboard.
...one seems to fall back to memory as a means of relieving the frustration and just getting the job done.
Looks like my practise / practice ( never get that right ) routine needs some changes.