Issue with public event submit form

We have a client who has a public event submit form and there are some issues that are happening. Let me preface this with that I have a user set up to be the “anonymous event submitter” and the name is appropriately chosen. I’ve also set their permissions (which is subscriber) to allow all except publish since the client wants to approve the events before being displayed publicly. So with that, here’s what’s happening:

When the submitter submits an event and the image they’re using does not fit within the image restrictions (which we’ve recently loosened up on to help remedy this), they’ll receive an error saying the image was too big, small, etc…but the event is still being submitted but as a draft. So when they go to fix the image with all the same info filled out in the remaining fields, after hitting submit, they are shown the “Unauthorized Access” error message.

I’ve gone through and tested without certain plugins deactivated and re-updated the permissions for the event submitter with no luck.

My main question is, is there a way to not process the event if they get a form error and if not, then is there a reason they’re not allowed to edit their own event?

Thanks for your help in advance.

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