I seem to have potentially messed up a bit. I recently uploaded the Hero '88 pickup, and then had to immediately update it to 0.1.2 to include a support script.
I uploaded the file, and it showed me that the file would be added, and I believe there was a submit button at the bottom of the page, but I clicked on the work-in-progress code viewer, and ended up closing the page.
When I went back around to restart and complete the update process, it told me an update was already pending.
Hopefully everything looks good on your end, and the update simply needs to be approved, because at the moment, my customization command /veh doesn't work if the Hero is the only enabled vehicle that uses it.