Calendar view does not display all events

Hi

I built a site with calendar and views if you click in the day in this exsample 14 june the are events in this day but it does not show up on month or block display for this view. it does display other day but in this case three of the days in the month does not show up month or block views only day views

www.marietjiekeetauctioneers.co.za

some advice would be greatly appreciated since i have no idea where to start looking for this problem.
it display most days perfect

tx guys

willie