I had the same problem by getting my enter key stucked, this is support:
2015-12-27 15:29 You wrote:
GC need to synchronize and keeps asking both codes...
Dont know what else to do
Thanks
Laginha
2015-12-28 13:19 Entropia Universe Support:
Hi Ricky,
Thank you for contacting us. We will have to synchronize your Gold Card, to do so, you will have to generate 2 consecutive codes, write them down and send them in a reply to this support case. Please don’t generate any more codes after those.
When I receive the codes, I will synchronize your Gold Card and update this support case when you may log in again.
Kind regards,
Hank | Entropia Universe Support
Cant blame, they were fast so i guess suport is the only answer