Some of the visual glitches could be related to the currently enabled browser engine of IE. The Internet Explorer browser has a setting that ensures the pages are opened in compatibility mode, which could be your case. This mode uses outdated standards for interpretation of the HTML markup and sometimes even renders the page incorrectly due to browser bugs.
The problem with the RadButton's text position is most probably related to the height that you specified for the control. The button control has a built-in default height of 22px or 65px. If you want to set another value please use the approaches suggested in the blog post How to set a custom height for RadButton and RadFormDecorated buttons in ASP.NET AJAX
If you are still having difficulties with the configuration of the RadControls' appearance please let us know so that we can help you accordingly.
the Telerik team
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