2003 Acura TL timing belt aligned with cylinder 3!!

Hi everyone, got stumped while doing a timing belt job on a 2003 Acura TL. The car has ~160k miles and got a timing belt job done previously. I recently bought it and saw coolant was leaking from the water pump. so decided to do timing belt and water pump at the same time. When i took the timing cover off, i saw that the timing belt was aligned to cylinder 3 (and i am absolutely surprised). Meaning, when i aligned the crankshaft at TDC, cylinder 3 aligned to the TDC mark (neither cylinder 1 nor cylinder 5). the car was running properly with no misfire to my knowledge or as i was told(it had a front O2 sensor low voltage CEL and obvious coolant leak). So don’t exactly know what to do with it. Shall i adjust the timing belt to position with cylinder 1 (i kinda want to do that to make things right) ? but don’t know if that is going to cause more trouble.

Thanks for your time and input!!

Tanvir