Caprice A String Intonation Issue

I got every string intonated correctly at the 12th fret except for the A string. It is still registering as flat and I’ve run out of adjustment range. It appears I need the screw to be longer. I’ve set my neck for minimum relief. A business card will slide under the 7th fret(while 1st fret is capoed and fretting the last fret) with a small amount of friction but not enough to move the string. The is truly a puzzle! Any help would be greatly appreciated.

-Greg P