Dawn,
You need fixed-HEIGHT rows in the table, not fixed-width. (Well, fixed
width is a good idea too, but the main thing is to prevent the table from
growing vertically. (If she keeps typing in a fixed-height cell after
it's full, the characters will keep coming, but they'll be out of view,
and that'll be her clue that the entry is too long.) (For fields of a
specific, usually small, length, you can of course specify its maximum
length in characters in its Options dialog.)
Tip: When you start with "I'm having the same issue here," but you don't
quote the original post, nobody readily sees what you mean, so generally
your question will be addressed as if there's no background at all.
ALWAYS quote the full original post when you follow-up on a thread,
unless your comment couldn't possibly require anyone to know what's
gone on before.