[PvK]

That's not the point. He's saying it would usually cost 2.5 times the cost of building the better facility to upgrade 5 facilities.

However he says that since there was only one completed lesser facility on the planet when the upgrade was requested, that the upgrade was carried out for the price of 0.5 the cost of building a better facility, but ended up upgrading all 5.

5 upgrades for the price of 1.

I checked for this, and thought the upgrade was labelled as upgrading one facility, and believed it. I hadn't confirmed that the actual right cost or effect was used in the situation described.

If true, it's a rather evil bug, especially for games with serious upgrades like Proportions has.

PvK