Why wont all my events display in my calendar?

Why aren't all my events showing up for a certain day in my calendar? For example, for June 22 I have three events I want to display for visitors to my site. Currently on my computer I can only see the first event, and I have to click on the "..." symbol on the bottom of the day to see all three. BUT, on two of my coworkers computers their format will let them see all three events right in the June 22 box. The whole "..." feature has been removed.

How can I stream line this so all my visitors see the same feature with all events listed?
 
sad I’m frustrated
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