Feels like I'm really late posting this, but iirc, there is no mention in WoR sourcebook of what exactly were the Spirits doing in Colleen between 3076, and 3082. Granted, that's not a lot of time, when you have to build everything from scratch, but hey - Sharks knew about Colleen - possibliy the only ones besides Spirits who knew - trading might not have been out of the question. We know the spirits at the very least managed to build a Crimson Langur factory, and 3 protomech factories (presumably for cecerops, chrysaor, and delphyne).
Most importantly, though, getting decimated by the Vipers, and then Adders bombing York may have been the impulse that the spirits needed to realise, that the game has changed. And when in the past, being a clan with not much worth fighting over meant they were generally left alone, now their enemies might kill them simply out of spite. That, and their continued faliure to make any progress in the clan council (except making friends with Cobras), as well as having some possible friends outside the homeworlds (Ravens, and possibly Sharks) may have prompted the clan to seek sanctuary somwhere besides Colleen. At any rate - if they knew that other clans would be gunning for them as soon as they found Colleen, rebuilding their touman would have been top priority, and that doesn't seem to match what was happening. And why keep using the gene labs on Strana Mechty? If they moved the repository to their new home, why not get the labs running there? Could it be that they were setting up gene labs somwhere else?
And the dropships trying to flee the system. Flee where? And more importantly - how. Dropships aren't jump-capable, so unless they were trying to randezvous with some hidden jumpship, that doesn't make sense. Unless it was a ruse, and they had another dropship, or two (bought from the sharks?) squirreled away and sacrificed some as a smoke screen.
The biggest hole in my wishful thinking is that if they did get help from the Ravens/Sharks in escaping Colleen, then by 3150, they'd have had at least 65 years of living in isolation - quite enough time to rebuild, and make contact again, at least with Scorpions/Ravens, so if any did survive, they'd be resurfacing right about now.