Time Picker behaves erractically when min and max is set

Using this example qml,

import QtQuick 2.0
import Ubuntu.Components 1.1
import Ubuntu.Components.Pickers 1.0

MainView {
    width: units.gu(48)
    height: units.gu(60)

    Column {
        DatePicker {
            id: datePicker
            objectName: 'datePicker'
            mode: 'Years|Months|Days'
            maximum: {
                var d = new Date()
                d.setFullYear('2030')
                return d
            }
            minimum: {
                var d = new Date()
                d.setFullYear('1990')
                return d
            }
            date: {
                var d = new Date()
                d.setFullYear('2010')
                d.setMonth('5')
                d.setDate('15')
                return d
            }
        }
        DatePicker {
            id: timePicker
            objectName: 'timePicker'
            mode: 'Hours|Minutes|Seconds'
            maximum: {
                var d = new Date()
                d.setFullYear('2030')
                return d
            }
            minimum: {
                var d = new Date()
                d.setFullYear('1990')
                return d
            }
            date: {
                var d = new Date()
                d.setHours(12)
                d.setMinutes('30')
                d.setSeconds('30')
                return d
            }
        }
    }
}

The timepicker behaves erractically. When selecting a minute, the hour picker. When selecting things with the second picker, both the hour and minute pickers advance forward as well.

It's interesting the min and max dates are being set (this was discovered trying to workaround bug https://bugs.launchpad.net/ubuntu-calendar-app/+bug/1328600) as a timepicker likely doesn't make sense to have a year, but since they can be set the pickers likely should behave properly when done so.