So, I noticed two glitches with the building editor.
When I load a building, several of whatever segment I have selected gets added underneath the building.
When the building is on the ground and I try to add something under the bottom row, several of whatever segment I tried to add gets added, forming a pillar of sorts.
There are also problems with both building and airship editor:
When scrolling in the segment selection by holding the up or down arrow thing with my mouse as opposed to using the mouse wheel, the scrolling is painfully slow.
Also, deleting modules by right clicking just acts weird - sometimes it doesn't remove the module unless I click again, and if I try to right click an empty space it adds a module.
Ah, also, when invading a city reserve ships are useless - when you activate them, the reserve window covers the move command, leaving activated ships on the edge of the screen.
You can close the reserve window again, but noted, thanks.