time slots

Appointments plugin … i set services for 30min 60min 90min … but in front-end i only get 30 min time slots for all services … eg: 8:00 am – 8:30 am … 8:30 am – 9:00 am …for the 60 min should be 8:00 am – 9:00 am 9:00 – 10:00 am … here is the link http://anunturiuk.com/test/masaj/make-an-appointment/