Ok, I’m just getting back into the game after being away since before the changes to blueprints. Am I understanding this correctly: There is a 30 day limit on research jobs. You can use various methods to speed research time. Certain high level item blueprints cannot get to level 10 in 30 days or less, and hence have lower perfect levels. On the other hand, there may be legacy BPs with higher levels than what is currently researchable.
A job with a single run may exceed 30 days. Multiple runs will cap at 30 days.
Think of the limit as ‘30 days, or the time of a single run, whichever is longer’.