The red line marks the current time when today's date is displayed inside the Scheduler's day view or week view. Its display depends on the Scheduler configuration.
The layout issues, which you are observing, should not occur. You can check our online demos to see how the Scheduler should look like:
In your application, please make sure that there are no custom CSS styles, which break the Scheduler layout, and also verify that the jQuery version is compatible with the Kendo UI version.
If the problem persists, please provide a runnable example or a live URL for inspection.
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