You are welcome.
1. What I see at iCloud.com. Yours should be the same I think.
2. I only see one Photos. The pictures in the Photos icon are uploaded by the Photos program on your computer/device. I'm not sure how the pictures got in iCloud Drive, but normally they would have been saved/copied there. The pictures in the Photos application and the pictures in iCloud Drive aren't linked to each other.
3. Sometimes the sync process gets slowed down/stops..
Try Settings/iCloud and slide off syncing. Wait a few minutes and then resync.
Try going to System Preferences/iCloud and stop syncing. Wait a couple of minutes, then recheck syncing.
Have you tried signing out of iCloud and then sign back in?
You should have a Photos app on your iPad which will let you see the pictures in the cloud that are in Photos. Check Settings/iCloud to make sure the sync is switched on.