In v2 the new reminder stuff is still buggy.
Steps to reproduce
(1) Create a new task and add a reminder with the time set at 0 mins.
(2) Sync with the server.
(3) Notice is has added a second reminder as well as yours and this one is set at 30 minutes.
Apart from this bug I think the default reminder time should be 0 minutes not 30
And while were on about reminders, it would be good to be able to set the reminder from the Add task notification too