It looks like your quota service wasn't set properly. I reset your mount and ran the
setdisk command as root. Temporarily set the users disk quota to 5GB. Checked the dashboard and all looks well. Let me know if you have any other questions.
PS: I have logged out of your server and dashboard UI and tossed credentials. YOu may additionally delete them from the PM for added assurance.
Looks like there is a particular bug in the arithmetic of the setdisk command. Any disk settings should be done in full arguments, i.e; 500GB, 4TB, 12TB etc. It will throw an error when a decimal is placed in the setting of the quota. Thus, 1.5TB, 6.8TB and on and on will issue an error. If 8.4TB is needed, then this value must be converted to GB, i.e; 8601GB.
A good online tool for conversion can be found here.
I will either work on including a script that can convert these values in a human readable way, or possibly include a means to actually convert these decimal values automagically when inserted.
Thanks @demonotaku for your time, your report and permitting me access to your server to reveal this.