Calendar not loading correct resource

The reserves in my site are made from a search page and then to a calendar/formular page.
The problem is that when coming from the search page and choose to book a house, the calendar in the next page (with formular) always loads the default resource – and not the chosen.
See it for yourself here (choose “Reservar” on the first house, and you’ll se that in the next page it’s the other resource calendar)

I’ll add that in next update.