Other mistake: When Drek lands in New Quartu, his crashed shuttle is facing towards the Deplanitizer's direction. His shuttle should be facing the other way since he was launched straight to New Quartu.
Other mistake: After the ghost "possesses" the building and blows out the windows, no shards of glass or debris land on the Ghostbusters as they get up to escape, even though there was plenty of time for the glass and debris to rain down on them.
Suggested correction: You can plainly see that the debris is actually flowing upwards in defiance of gravity. Spectral energy is running amok and the laws of physics are all over the place.
Other mistake: In the hit on Port Commissioner Griffin at the beginning of the movie, he picks up the phone at 9:20 (office wall clock). When he is killed, there's a close-up of his phone that is totally, well, phony for many reasons. Most notably, the time of the call is stuck at 36 seconds even when the close-up lasts longer than a second. You can read also on top that the time is 1:44 PM, which is inconsistent with what shown earlier and with the fact that it's evening! It is also displayed as a Blocked Caller, too, which makes no sense. (00:02:10 - 00:03:00)