Thanks a lot for the update.
You can use the following article in order to determine the render mode on the page easily:
It will be also helpful if you send us a FiddlerCap log from the page loaded in local and in production, so we can compare the requests:
You can also follow the suggestions in the first two points of the Improve Your Debugging Skills with Chrome DevTools blog post explaining how to inspect the generated HTML and check the applied styles for various elements.
In this way you can check if the problematic styles are coming from a specific CSS file, or are set inline.
If they are set inline, you can compare the source of the page via a tool like Diff Checker and see what the differences on local and production are (especially in the $create statements of the Scheduler).
If the above does not help, you can open a primary support ticket (which is private) and send us a live url to the problematic page.
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