Event View is not correctly

Hi

I have the following problem:
On the coursplan is some mistake inside. When I go over tuesday on course WOD Class (Strength Only) there comes an hover green. I cannot found why that will show. I have disable it and I had tried to create a new one. But the hover will allways showing.

I hope someone can help meh to remove that.

Thanks

The page I need help with: [log in to see the link]