Upon hitting level 50 in mining I received rewards for every level a second time. (rewards being coins and land plots)
I currently have 105,800 coins and 191 land plots when I should only have about 55,000 coins and 97 land plots.
Video of "re-leveling" in progress: https://www.youtube.com/watch?v=nQbSmczsJD4
(I scrolled through chat to show rewards)
Images showing coins and plots and profession levels