Inproper Spark

[Threshld1]

So recently i started having bogging problems under heavy load problems again. I just recently changed my water pump and idler pulleys as they were nearly shot. I replaced the timing belt exactly as it came off and verified TDC at 12 o clock on all 3. I also checked it before i started it and checked it with a light too. Showing 15 deg on start up and it will move towards 11 and hold there as it warms up. Reving causes it to go ahead to 30 and beyond according to the light.

The problem didnt go away with the new pulleys so i decided to throw the light on the other cylinders. #2 is flashing at nearly half the rate as #1. #3 is flashing fine at the same frequency as #1. And finally #4 is very spratic at half to a quarter the frequency as #1 and #3. When i rev it #4 will clean up and flash properly for maybe 1k rpm and then abruptly cut out for a few cycles and come back. Plugs, wires and coilpack are new within the last 2 months

I ran the scan tool and im showing no timing correction at all. It shows a 15 deg btdc at idle. When driving when i start to load the motor, it will start moving up to 50 and then suddenly drop to 35-25. Not throwing any codes, knock sensor has white connector.

Another thing that concerned me durring belt reinstallation was the ease of turning the passanger cam pulley vs drivers side. I could turn the passanger side quite easily, it made it difficult to install the belt while maintaining 12 o clock. The drivers side was much harder to turn.

Would anything i did with the timing cause this? Such as being off by a tooth or something despite all knotches being 12 o clock?

[Threshld1]

Update:
I unplugged the O2 sensor just on a whim and lo and behold... it cleared up entirely and runs great. It also took it 2 days to realize it wasnt connected to throw a code...
Thoughts?