Good to go according to the top pic in the 1st post.
The valve should be turned to clean the pump basket and thats what you do.
Backwashing is to clean the sand/DE filter.
Are we still having a terminology mixup ?
If you were emptying the pump basket, the valve stops flow from the pool. (Assuming because the equipment is lower than the water level). The water in the pipe above the pump will drain back through the pump when you open the pump lid. It should stop pretty quickly.