Business hours and labels in fullcalendar scheduler - fullcalendar

Question

I'm trying to use scheduler in order to show classes time from one entire day. The problem is that class time is 50 minutes, and between some classes has interval.
I did that using business hours, but it has a strange behavior in labels. Labels do not respect business time, the only thing I could do is show labels from 50 to 50 minutes too, but it is not enough because of intervals.
See below how it shows:
And now, how I would like it is:
And here is my code:
<script>
$(function(){
var todayDate = moment().startOf('day');
var YESTERDAY = todayDate.clone().subtract(1, 'day').format('YYYY-MM-DD');
var TODAY = todayDate.format('YYYY-MM-DD');
var TOMORROW = todayDate.clone().add(1, 'day').format('YYYY-MM-DD');
$('#calendar').fullCalendar({
resourceAreaWidth: 230,
editable: true,
aspectRatio: 1.5,
scrollTime: '07:25',
slotLabelInterval: '00:50:00',
slotDuration: '00:50:00',
slotLabelFormat: 'HH:mm',
defaultView: 'timelineDay',
resourceLabelText: 'Turma / Sub-turma',
businessHours: [
{ id: 'a1', start: '07:25:00', end: '08:15:00', dow: [0,1,2,3,4,5] },
{ id: 'a2', start: '08:15:00', end: '09:05:00', dow: [0,1,2,3,4,5] },
{ id: 'a3', start: '09:20:00', end: '10:10:00', dow: [0,1,2,3,4,5] },
{ id: 'a4', start: '10:10:00', end: '11:00:00', dow: [0,1,2,3,4,5] },
{ id: 'a5', start: '11:10:00', end: '12:00:00', dow: [0,1,2,3,4,5] },
{ id: 'a6', start: '12:00:00', end: '12:50:00', dow: [0,1,2,3,4,5] },
{ id: 'a7', start: '13:15:00', end: '14:05:00', dow: [0,1,2,3,4,5] },
{ id: 'a8', start: '14:05:00', end: '14:55:00', dow: [0,1,2,3,4,5] },
{ id: 'a9', start: '15:10:00', end: '16:00:00', dow: [0,1,2,3,4,5] },
{ id: 'a10', start: '16:00:00', end: '16:50:00', dow: [0,1,2,3,4,5] },
{ id: 'a11', start: '17:00:00', end: '17:50:00', dow: [0,1,2,3,4,5] },
{ id: 'a12', start: '17:50:00', end: '18:40:00', dow: [0,1,2,3,4,5] },
{ id: 'a13', start: '19:00:00', end: '19:50:00', dow: [0,1,2,3,4,5] },
{ id: 'a14', start: '19:50:00', end: '20:40:00', dow: [0,1,2,3,4,5] },
{ id: 'a15', start: '20:55:00', end: '21:45:00', dow: [0,1,2,3,4,5] },
{ id: 'a16', start: '21:45:00', end: '22:35:00', dow: [0,1,2,3,4,5] }
],
minTime: '07:25:00',
maxTime: '22:35:00',
resources: [
{ id: 'd', title: '1º Semestre', children: [
{ id: 'd1', title: 'Turma A', children: [
{ id: 'd11', title: 'Sub-turma A' },
{ id: 'd12', title: 'Sub-turma B' },
] },
{ id: 'd2', title: 'Turma B' }
] },
],
events: [
{ id: 'e1', resourceId: 'd2', start: TODAY + 'T07:25:00', end: TODAY + 'T08:15:00', title: 'event ' },
{ id: 'e2', resourceId: 'd2', start: TODAY + 'T08:15:00', end: TODAY + 'T09:05:00', title: 'event ' },
{ id: 'e3', resourceId: 'd2', start: TODAY + 'T09:20:00', end: TODAY + 'T10:10:00', title: 'event ' },
{ id: 'e4', resourceId: 'd2', start: TODAY + 'T10:10:00', end: TODAY + 'T11:00:00', title: 'event ' },
{ id: 'e5', resourceId: 'd2', start: TODAY + 'T11:10:00', end: TODAY + 'T12:00:00', title: 'event ' },
{ id: 'e6', resourceId: 'd2', start: TODAY + 'T12:00:00', end: TODAY + 'T12:50:00', title: 'event ' },
{ id: 'e7', resourceId: 'd2', start: TODAY + 'T13:15:00', end: TODAY + 'T14:05:00', title: 'event ' },
{ id: 'e8', resourceId: 'd2', start: TODAY + 'T14:05:00', end: TODAY + 'T14:55:00', title: 'event ' },
{ id: 'e9', resourceId: 'd2', start: TODAY + 'T15:10:00', end: TODAY + 'T16:00:00', title: 'event ' },
{ id: 'e10', resourceId: 'd2', start: TODAY + 'T16:00:00', end: TODAY + 'T16:50:00', title: 'event ' },
{ id: 'e11', resourceId: 'd2', start: TODAY + 'T17:00:00', end: TODAY + 'T17:50:00', title: 'event ' },
{ id: 'e12', resourceId: 'd2', start: TODAY + 'T17:50:00', end: TODAY + 'T18:40:00', title: 'event ' },
{ id: 'e13', resourceId: 'd2', start: TODAY + 'T19:00:00', end: TODAY + 'T19:50:00', title: 'event ' },
{ id: 'e14', resourceId: 'd2', start: TODAY + 'T19:50:00', end: TODAY + 'T20:40:00', title: 'event ' },
{ id: 'e15', resourceId: 'd2', start: TODAY + 'T20:55:00', end: TODAY + 'T21:45:00', title: 'event ' },
{ id: 'e16', resourceId: 'd2', start: TODAY + 'T21:45:00', end: TODAY + 'T22:35:00', title: 'event ' },
]
});
});
</script>
Please help-me!!
Best regards