That is because the 5 songs you uploaded before are the different version of a track.
Please upload the different versions of your tracks in one pack of ZIP.
Hope that helps.
So if I understand you right, if I have one track with three different length versions, I load them all into the same zipped folder? What if they exceed the 150MB limit?
This is what happened prior and why I uploaded them individually.
So just like I told you before, you can upload the lead version of the track first.
Or you can upload fewer versions.
There is no solution for your issue now, and we will try to figure it out.
Have a nice day!