Here's the definition for 22disk (it worked here, at least).
Tracks 36-40 on the disk are not written to.
The disk capacity specified is lower than what 22disk indicates for 40 tracks.
Perhaps it would be better to enter the following:


DENSITY MFM ,LOW CYLINDERS 36 SIDES 2


BEGIN BOSS Olympia-BOSS CP/M 2.2 - DSDD 48 tpi 5.25"
DENSITY MFM ,LOW CYLINDERS 40 SIDES 2
SECTORS 9,512
SKEW 5
SIDE1 0 1,2,3,4,5,6,7,8,9
SIDE2 1 1,2,3,4,5,6,7,8,9
ORDER SIDES
BSH 4 BLM 15 EXM 1 DSM 165 DRM 127 AL0 0C0H AL1 0 OFS 3
END