Wow, that was fast. As soon as that game started, I found a planet with the max per post caps violated. If you check out the planet labeled as the violating planet, you will see 2 or 3 Mk. III blade spawners around several of the guard posts (each).
I think this happened during game seeding too. So you should be able to copy the settings I used from the save game and debug the seeding process from there.