Row height appears to be locked

I have run into a strange little problem I hadn't encountered before.

I created a "Note" table style, based on an old one. It's one row and two columns, with the left column containing an "information" icon.

The format looks fine, as long as the note is only one line of text.

If it goes to multiple lines, the text starts over on the same line, writing over it. I realize that may not make much sense, so here is an example of what this looks like if I start typing "This is a note" over and over again:

The row height appears to be locked. I tried to increase the maximum height at Table > Format > Row Format, but I can't increase the maximum over 14.

Help! And thank you!