Fluffy Bunny Feet
Emperor Mongoose
It would be natural to remove it as a UNIQUE ship that appears in one adventure. Leave it in that adventure not double publish it where players will be familiar with it before they play.Rightly removed from the revised, current version.
Alien ships can and do have special rules. The jump drives may very well be an advanced design with a much longer time for break downs, it is a TL 15 ship by the write up. Its crew might have been around until very recently as well as the fuel only last 8 weeks. It has 2 jump drives so it would take twice as long to reach the unmaintained limits causing misjumps.We know it is misjumping because the rules say that an unmaintained ship (without the special DNR system) and no sophont performing astrogation will quickly start to misjump. The rules are very clear on the effects of that. Except if it doesn't follow the rules*, which you are usually very voluble about!
The no sophonts rule may not apply to the alien tech as well. The no sophonts rule doesn't seem to be in any book I have so I can't judge the degree to which it applies/does not apply.