I've discovered that there is a problem with uploads of maps to the site during the submission process that has resulted in a number of them not actually being uploaded. The map's information is all saved, but the file upload sometimes fails.
If at all possible, please provide a mirror so that I can download your submission should the upload fail MediaFire and Mega are two great free resources for this.
If you have a submission that has not been approved yet, there is a good chance that it's because the upload failed and I don't have any alternative download source. Feel free to contact me
and let me know if you've uploaded it somewhere else.
I have not been able to figure out the bug yet -- partially due to time constraints, but also because no errors are reported on the server's side -- but I suspect it is a specific browser issue. In any case, I plan to completely revamp the upload mechanism since it is outdated and will let everyone know when the issue is resolved as soon as I can.
Apologies for the inconvenience.