You're missing the point of the offsets; the sprite: 55 in your craft definition points to the INTICON.PCK sprites, not the BASEBITS.PCK sprite. You need the BASEBITS.PCK index to be 55+33=88, not 55 as you have it defined.
Finally I get it:)
- type: INTICON.PCK
files:
26: Resources/minimized.png
+ 33 = 59 which is sprite in hangar
37: Resources/dogfight_icon.png
- type: BASEBITS.PCK
files:
59: Resources/ship_in_hangar.png
26 + 11 = 37 which is dogfight icon
and at the end
59-33 = 21 which is number of SPRITE
Thank you for explanation! It was little confused....