The list is populated as soon as you enter the tab. So, if you delete a container and then immediately switch to the manager, then the deleted container will still appear there.
Beyond that, the manager makes use of unRaid's management system, so if you are manually deleting containers at the command prompt, then the docker tab (and the manager) may or may not show the correct information.
But, quick comparision of your two screen shots shows that everything looks ok. Admittedly I didn't zoom right in to compare all of the names from one shot to another.