TL;DR
Distributor is put in the correct way but 180 out car only started when I rotated plug wires 180°

I have a 1991 Civic DX hatchback with a D15B2. It wasn't running for a while so I've been trying to resurrect it. It had a crank, no start condition. I replaced the fuel pump, didn't fix it. I opened the dizzy to check that and noticed the rotor was destroyed (half was missing not sure where it went) so I ordered a new dizzy off eBay. Install it and now it still doesn't start but backfires from the intake manifold (timing issue right?). Decide to time the car, line up crank pulley at TDC and cam gear lines up with head and 'UP' facing up. Still doesn't start. I remove the dizzy cap and notice the rotor is pointing at cylinder 4 (top right) instead of cylinder 1 (bottom left) so I decide to rotate the 4 plug wires 180° and it fired right up.
Before you ask, the dizzy only goes in 1 way unless you force it, and I didn't. It slid right in without force. Also the rotor is keyed so it can't be flipped 180. So what the hell is going on here?