Like other I have had issues with using tables in my content when working with WordPress Mobile Pack. Plugins fail to help.
After a tremendous search I found out it had to do with the implode function found in the file wpmp_transcoder.php. Which is located in the plugin folder in an other folder: plugins/wpmp_transcoder
'$content = "<p>" . @implode("</p><p>", $pages[$page]) . "</p>$pager";'
By removing this, I was able to have tables in the content, but it would also upset my other content, so beware before using this.