Excel 2010 Auto-copy when highlighting multiple cells

Hey Guys,

First time on the forum. Recently ran into this problem where when I select(highlight) multiple cells, it automatically copies the highlighted cells.

https://dl.dropbox.com/u/15270986/Mi...0_18-19-19.png

This auto-copy also occurs periodically when I select(highlight) a single cell.

Notes:
1. I do not have a copy hotkey on my mouse, as this also happen when I use the trackpad.
2. This only happens in excel. When I select multiple items on my desktop, it does not auto copy.

Any solutions or suggestions?

Best,
Jason