I don't fully understand, are you seeing something like visits that are all 1 user action that should be grouped in one or some other behavior. Maybe a large number of applications? Visits can't travel across defined (or auto-detected) applications so maybe that is an issue?
Whats's contained in the screenshot is normal, different users visiting the application will be grouped individually. Please provide some more detail, even just more of what's in the visits dashlet you're looking at.
No worries, and I've seen cases where this occurs when the dtcookie which is what is used to track actions across one visit is either lost or not carried between requests, leading to it being recreated when it is null and as a result each page load is seen as a new visit. Is this something new that occurred or is this the first time with UEM on the application?
Maybe wait for some more answers here as I haven't dealt with this first hand, but if you can't resolve it I would check with support. They'll likely ask for a Fiddler trace of a visit to see if and where the issue is more easily
Can you check if the cookie is set correctly in the browser and if so, does not change with every new page load?
You can do so e.g. in chrome: open developer tools (F12) then open the applications tab. on the left site there is a entrie for cookies. The name is "dtCookie".
I too faced similar issue for hybrid app. My visits were getting split into two application one was default application and other was the custom app which I added into the UEM tab in System App profile. You should try shutting down UEM in default. Also remove auto detection of the Application and define one app for all applications. Then retry.