Cannot upload more than one app a day - the rest are rejected.

Hi all, I create apps for Apple and I've been encountering the issue that I cannot upload 4 or 5 apps in a day because they are rejected. It only allows me to upload one a day. Has anyone else encountered this issue/limit? Any advice or ways to resolve this issue? I have multiple apps to complete and upload but this issue has been delaying the process. Thanks in advance.