Calendar events no longer disappear

My events are not disappearing after they happen anymore. I think they did in the beginning. So, for example, I have event 1 being the whol shift I am at work, event 2 was my client an hour in, event 3 was my client right after, I have a break where I am still at work, and then a client right before the end of my shift. My shift, client 1,and client 2 show as my three events, but now that clients 1 and 2 are done, it should show client 3 and it does not.