The Google Analytics script is inserted before the Doctype at the beginning of the HTML code of your page: it should be inserted just before the closing tag at the end of the HTML code.
You are copy-pasting directly from an MS Office software in your posts and the resulting code is thus terrible, like:
<p class="MsoNormal" style="margin-left: .75in; text-indent: -.25in; mso-list: l0 level1 lfo1; tab-stops: list .75in; mso-layout-grid-align: none; text-autospace: none;"><span style="font-size: 10.0pt; font-family: Arial; mso-fareast-font-family: Arial;"><span style="font-weight: normal;">d.</span><span style="font: 7.0pt &amp;amp;"> </span></span>
The above code for displaying 2 characters, ouch
While copy-pasting into a new post, you should use (activate Advanced Options first) the icon with a W : Pasting from Word. This should get rid of most of the particularities of MS Office.
What are the display problems you encountered? Did you compare the demo to your existing homepage?
Browser compatibility: page not centered in IE7 (OK in IE6), small glitch on the active Home tab in IE6 and IE7 and that's all. Fine on Fx 3.0 and Fx 3.6.6
The glitch on the Home tab is already present on the demo of the theme
CSS3 properties like text-shadow, border-radius, box-shadow, etc won't work on old browsers that didn't support it at the time but that's not a real problem as long as your page is stil viewable and functional: these are graceful degradations.
Please begin by (re)moving the GA script