After some trial and error with the same issue on the USB-C port, I discovered that the USB3 ports were not going into the back panel 100% flush. Once I sorted this out the back panel aligned properly.
If you're just having issues with the USB port then consider yourself lucky, on my case the two halves making up the body were not even in alignment
I'm so glad someone posted about this, I've been playing around for a day or so trying to get this to work with no luck. Thanks!