I recently acquired a Epiphone Viola bass. I tried restringing it with the La Bella 760fhbb Beatle bass set. I read in multiple places on the internet that this would suffice. It did not. The A string "playing surface" ended just shy of the nut. Did I purchase the wrong set? Can the internet not be trusted?! A manufacturer defect? Operator error? Feeling dumb. Never had a string issue like this in 20 years of playing. Please advise.