Word is a word processor, the entire sea, but sometimes that surprises you when you try to get all the juice to their profits. This case is when you're on the same page in two columns, paragraphs, and paragraphs without columns (one column really) and want to use the footnotes .
Imagine you have a document that has several paragraphs in two columns (one section) and is followed by paragraphs without columns (on another different section but on the same page).
Everything works fine until you insert the footnote in a paragraph of the section in two columns. Word
section extends the two columns to fill the entire page and thus put the footnote also two columns, automatically from text columns in the following section to a new page, although it has plenty of room for put in the same
.