If you can look into this as well, it would be most appreciated. When I purchased domain last week, there was an error in the purchasing process, so I have duplicate domain awaiting payment, but I already paid for it, and Hostinger shows it was paid and that the previous receipt was cancelled.
It has nothing to do with Hostinger though, the problem is in your 000webhost Cpanel showing duplicate domain. How would Hostinger be able to fix this?