We were able to move the black cell highlighter by using the r/l/up/dn arrows
to navigate between all of our columns and rows. Somehow now we aren't able
to do that. Using those arrows, our whole page moves and the black box
highlighting the last cell we worked in stays in place. Now we have to use
the cursor to move to any previous cell or the tab and enter keys to move to
new cells. Any ideas?