wysiwyg issues

I’m using the default twenty ten theme and trying to make a simple post.
I’m adding an image, aligning it to the left. Then I have a list of features I want below it. I have it looking fine in the editor, but when I post it, it shoves half of the features up along the right side of the image and since these features are in an unordered list, it looks terrible.

I’ve pressed enter so it places the text under the image, but it still pushes it where I don’t want.

I’m told I need to create some sort of div and edit it the way I want. Is this true, or is there an issue with the editor? This is really annoying, I have about 100 posts like this I need to make. Another thing, when I click remove formatting after using pasting copied content from one site to another, it puts all the font info and everything back when I save the post so I have to go in html mode and manually edit out everything. Is this not what the remove format button is for?