Observation towers and vertical drop/launch rides doesn't allow me to build entrance and exit. No matter in which order I place them, exit first and entry last or the other way around, as soon as I build the second one, the both of them simply poof out. I tried building it with the game paused, tried all the different entrance and exit types, tried pre-building the rides in the ride editor, but even there it wont let me put them.
Oddly enough the "escape hatch" ride has a functioning entrance and exit.
Help?