Mine took 1 day to be processed, but yes some of my friends had to wait for about 10 working days. My understanding there were some issues with their system.

The visa is valid for 59 days from application date (i know i traveled about a month and a half from the day i took it). Once you enter UAE, you have 30 days to leave unless otherwise communicated by passport control.

Yet always check their website for updates on terms as these can change.