Word Columns Keep Changing

[Jenga]

I have a document with 2 columns. I have protected the document with editing restrictions, and use this to send to employees to fill out job information. Starting about last week, I had an employee turn the document in to me, and the columns had changed to only 1 column. I fixed it, and thought nothing of it, and then noticed that my Master copy of the document has the same problem. Every time I open it, it is 1 column. I will enable editing, change it back to 2 columns, restrict it again, and save it, and when I go back, it is back to 1 column. The thought of having to change it to who columns every time I open it, is driving me crazy. Any ideas on how to fix this?