Not sure if the lights issue is a bug but i found myself in the same spot when i changed them…
I finally added ALOT placeholders into the goods.ini and only changed the light_equip.ini as i want my lights to be. That way i don’t have to buy a new ship all the time. It’s only a work around i know.
There is a mod which has a lights shop, “Hamburg City”, however i do not know how they handle it.
And about changing Hp’s… I came across something weird too. Sometimes when i placed Hp’s in hard_cmp they were changed in orientation and sometimes in position too. Actually i think they were put to the next surface if i had them inside one object. Maybe they were too close to the edge or something idk, it finally worked when i changed that object to have a real interior, like say ur object is a sphere and u substract another smaller sphere from it u get a real “hull”.
Not sure if this helps, just my observation.