I think what you were trying to do is create a table. They are not recommended on profile pages because the formatting, or mark-up, is more complicated and can be intimidating, or like you have noticed, is easily messed up. Instead, use some simple wiki mark-up tools:
* An asterisk creates a bulleted list. It will separate each item on a separate line and is great for listing children.
# The pound sign creates a number list. Like the asterisk, you'll get each item on a separate line, but they'll have numbers instead of a bullet point.
: A colon indents the text and creates separate lines. It is better for paragraphs like if you are quoting a source and want to make the little paragraph stand out. Multiple colons will indent more.
<br /> Add a line after the sentence or paragraph. This is good if you want to force something to the next line.
You should get comfortable with these before attempting anything more fancy and remember, not on profile pages. Keep those simple for everyone to use.