if you are using a refilled catridge you would not get ink levels right.
if you want right ink level use genuine ink catridges.
you can try taking out the catridges turning off the printer and turning it back on and then reinstalling the catridges.it might not help so if possible buy hp ink catridges.
Close the top left pin at head contactor (1 pin only), with tape. Plug it in head carriage. Unplug it. Close to top rigtht with tape too. Plug the head. Unplug head. Remove all the tape cleanly. Plug again. See ink monitor.