Word 2002 "Online form" Problem

I created a form in word 2002 so users can enter information in the computer instead of handwriting. It is for the most part done but I found a major problem when I tested entering information as the user would. On one line for example I have:
First Name:(text field) Last Name:(text field)
I but both on the same line because the document is already 3 pages long and I needed to save space. Whats happening is when the user types in the First Name it is moving the Last Name field to theright and I do not want that to happen there is more than enough space between them. Can someone please help me so this does not occur. I have spent all day and would greatly appreciate some help. On lines requesting only one entry:
Company Name:(text field)
I have no problems.

Thank you very much in advance,
Carl Johnman