If i upgrade a ship design and save it with the same name to replace the old one, both designs will show up in the quick ship built window (the window that comes up when you press the far left button ofthe UI) with the same name. If i go to the planet's shipyard this doesn't happen. Sometimes this bug doesn't show up right after i've upgraded a design but a few turns later.
Also a ship design that i hadn't rendered obsolete just dissapeared from the build list even though i still had a few of those ships in play.
Are you guys aware of that? Is it common? Hope it get's fixed