XDJ-RX Date Modified on recording is wrong?

This is normal. R does not have internal clock.

@James > Where are you looking at that info - on the file metadata itself within the system file browser (Finder or Explorer)?

I'm looking at 'date created' on windows explorer

Yeah, you can't go by that date.

Where can i find the actual date, properties?

@James > As @Mitja noted, there is no clock in the XDJ-RX, so it doesn't know how to timestamp it properly.

Could this be implemented in a future update?

Sadly, no, it would require a hardware clock and battery inside the hardware.