Trying to get list of formz updated for today via API

I am trying to get a list of all the formz updated today. when I run the API I get 5000 formz returned in the list. When I go into the portal and I filter to only show stuff for today there are only 129 forms modified today. Why is the API not returning the data correctly? How do I get it to only give me formz updated today?

Thanks
Lee