Are you writing your posts directly into the visual editor? Or are you using some word-processing program to write your posts?
It looks like you have a lot of code that is messing up the formatting:
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<code><div id="attachment_1328" class="wp-caption alignright" style="width: 160px"><a href="http://momfog.files.wordpress.com/2011/03/azaleas-in-savannah-11.jpg"><img class="size-thumbnail wp-image-1328" title="Azaleas in Savannah 1" src="http://momfog.files.wordpress.com/2011/03/azaleas-in-savannah-11.jpg?w=150&h=112" alt="" width="150" height="112" /></a><p class="wp-caption-text">Close-up of Red Azaleas</p></div></code>
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<div id="attachment_1323" class="wp-caption alignleft" style="width: 160px"><a href="http://momfog.files.wordpress.com/2011/03/azaleas-in-savannah-1.jpg"><img class="size-thumbnail wp-image-1323" title="Azaleas in Savannah 1" src="http://momfog.files.wordpress.com/2011/03/azaleas-in-savannah-1.jpg?w=150&h=112" alt="" width="150" height="112" /></a><p class="wp-caption-text">Early azaleas on a fence in my neighborhood</p></div>
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<div class="mceTemp">Daily Foglifter: When General Sherman marched through Savannah during the Civil War, he was so impressed by her beauty that he sent a telegraph to President Lincoln, offering Savannah to him as a Christmas present.</div>
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I’m sitting here looking out the window basking in the splendor of the a perfect day. Spring has sprung in <a title="My St. Patrick’s Day In Savannah" href="http://momfog.wordpress.com/2011/03/18/my-st-patricks-day-in-savannah/">Savannah</a> and it’s a beautiful time of year. The temperature is in the 80′s, the days are longer, and the aroma of blooming flowers permeates the air. The <a class="zem_slink" title="Azalea" rel="wikipedia" href="http://en.wikipedia.org/wiki/Azalea">azaleas</a> are in blossom and the roadsides, fences, and lawns of Savannah are saturated in pinks, reds, and whites. It’s truly a stunning sight to behold. </div>
I use a Mac, so LiveWriter is not an option for me. But I believe it might help you format the tables you should be using to make posts exactly as you want them to be.