Thank you for the additional details provided.
The issue that you have observed on our online demo has been already fixed and the demo will soon be updated. The misalignment was caused by the width attribute setting in the .fields css style:
This is a custom css style used only for this demo - please take a look at the "styles.css" tab on the page.
If you do not use these styles, or your case is different - please provide us a simplified working code that reproduces the issue (along with your css styles).
All the best,
the Telerik team
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