Argh, this module is driving me crazy

If I set up an unordered list the content of the tab is always moving outside the border of the background. Or vice versy - the background-color is not movin down toether with th content but it stops at the point where the ul begins.
if I kill the ul-tag all is working fine. But everytime when I go back to the editor to e.g. add another li-tag the tab is automatically filling up my content with a lot of p-tags.
If I delete the list-style-type in the frontend.css, the list-style is back but the content/background-problem still remains. So I thing that's not a problem of my stylesheets but there are still some bugs.
eblo