The improper display of the chart could be caused by some of the CSS on your page. You can try removing all the CSS from the page and if this fixes your issue then try to isolate the problematic CSS rule be re-adding your styles one by one. I have seen similar issues caused by properties like text-align and float.
If that is not the case, however, it is better to open a Support Ticket and attach a sample project with reliable reproduction steps so we can actually observe and debug the issue, since a mere screenshot is not sufficient to determine the problem.
All the best,
the Telerik team
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