some difficulty shifting

Hello every body My 05 6spd and i have been through alot, 11 months ago i changed the clutch machined the fly wheel and the whole 9 yards. Everything has been good for a while but as of recently ive noticed an issue shifting 6th wont engauge all the way unless i either shift from 4th or rev up to 6th coming from 5th, and 5th is unaccessable from 6th (down shifting). would an adjustment at the clutch pedal help this or am i looking at possibly other bigger issues?

Thanks

Jeff