The review videos of this will be good. I've rewatched a couple of streams. The rocket lifts slowly and seems to translate as it leaves the tower. I think thoe missing engines were gone from the start. It also seemed to fire a long time before it lifted. It may have been held whilst they tried to get all engines lit.
You can see in the back facing camera uneven flames and the rotation and procession start well before the planned separation. I think this was borked from before it left the pad but they kept it going as long as they could.
The Saturn rockets also used to translate away from launch tower. A lot of the Apollo crews commented on it.