Occasionally I get this weird thing where the mouse will suddenly insist on
selecting more than one cell when I click on a cell, usually cells in the
same column and adjascent rows. In other words, if I click on C3, it will
highlight C3:C4 or even C3:C5 or more. If I click and hold the left mouse
button, the cell info field (upper left of the screen) changes from the cell
number (e.g. C3) to "2R x 1C". I don't understand why it does this multiple
selection, and I don't know what I do to finally disable it. It doesn't do it
all the time, so obviously something must disable it (or correct the problem).

I've been working with macros a lot lately, but none of the macros seem to
permanently change a setting that selects more than one cell by default, but
maybe I just don't recognize a problem from a macro.

Please help? Thanks.