Got a drain problem. During the drain cycle, the water will not completely drain out.

Checked the pump and drain pipe, seems like working fine.

I did find out that piston & nut was broken. I Replaced it with a new part and it does not completely fix the problem.

I noticed that during the drain cycle, there is still water coming out of the lower spray arm (the holes on the arm), I wonder if it is normal? If it is not normal, what part is broken to cause this?

Thanks