Yes, I also can confirm, that the different ranges of the 34401A can independently be calibrated, regarding gain factors.
Anyhow, the -10V calibration affects linearity for all ranges.
Linearity and polarity inversion should be checked before attempting to re-calibrate the instrument, especially the -10V item; afaik, this is required only after A/D replacement, and should not be done routinely.
Frank