I have seen that on some of my completed shops when I click on the shop's "Visit ID". There seems to be no green band alerting that it's "Waiting To Report To Client".
I just shrug. If there is no "Enter Results For This Shop" tab and I've invoiced successfully, I assume that either the shop has been entered successfully or they (Maritz) shall notify me of something unseemly.
But, there is another way: You could note the "Visit ID" of that shop and then click on the "View Completed Shops" tab/link. Scroll through to see if the visit ID shows up.
Probably a quirk of their reporting system.