when you add 5 additional days to your rent (oh yeah, and 30 days is not available) it only gives you four.
i've done this twice with 6 days left, and afterwards it says i only have 10.
I'm also unable to extend my rent now that I have patrician status.
As for the 5 days turning into only 4. This is probably a display issue since it is maybe rounded down or day 0 counts.. or I dont know since it adds not a day since it works in seconds and converts into days for the display.
The second part is still an issue. Will fix soon.
after briefly turning in my key, i was able to re-rent and extend my stay again.
maybe the problem was that i had originally rented as a citizen, and then was trying to extend my stay as a patrician. unless of course you fixed it in which case muchas gracias!