Not sure what you done here but it should have fit. Here is some information, please let me know if this sounds correct...
1) The camera was mounted with 2 screws to the original fixture.
2) The camera has 2 guide pins.
3) When you place the camera on the new camera mount the guide pins and screw holes lines up with the holes in the new mount.
4) If the guide pins do not fit in the two guide holes, run a drill bit through those two holes of the appropriate size to allow the guide pins to fit.
5) Mount the camera to the mount using the two screws.
6) Mount the assembly into the Pop & Lock.
It should be good at this point. Too bad you cut up that mount but it looks like you can salvage it. It looks like you don't even have the screws installed to hold the camera to the mount but cut out the locations where the guide pins are. I recommend you take it apart and mount the camera properly so it mounts flush with the mount using the two screws. This will adjust the angle and fix your viewing problem.