Error setDate when minDate the same day

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When i set minDate the same day, as setDate, and when seconds, or minutes of minDate is greater than the minutes or seconds of setDate, then resulting datetime is broken.

minDate: new Date(2012, 1, 12, 8, 58, 2),
maxDate: new Date(2012, 1, 13, 23, 59, 59)
$("#somepicker").datetimepicker('setDate', new Date(2012, 1, 12, 20, 57, 6));

expected result: 12 Feb 2012, 20:57:06
really: 12 Feb 2012, 08:58:02

BUT
minDate: new Date(2012, 1, 12, 8, 55, 2),
$("#somepicker").datetimepicker('setDate', new Date(2012, 1, 12, 20, 57, 6));

expected AND really result: 12 Feb 2012, 20:57:06