For both the phone booths and the meeting rooms in Lisbon, we've lost the ability to limit the # of slots booked -- note: I am not referring to the length of the slot, but how many slots can be booked. (I assume the limit is per day but not sure.)
For phone booths, there should be 30min slots and a max booking of 4 (2 hours total)
For meeting rooms, there should be 1hr slots and a max booking of 2 (2 hours total)