Can Anyone Help? Must Do Copy/Paste Sequence Twice

If I highlight text, then either cut or copy, then attempt to paste somewhere else in the same document, it doesn't paste anything. It acts like nothing happened when I either type ctrl+v or use Edit<Paste.

The only way it will paste what I just cut/copied is if I cut or copy that same text again. Once I do that, I will be able to paste that same text over and over.

So, it always treats the first cut/copy of a particular snippet as invalid. This happens in any document, even a new one.

Example:
Hello, my name is Mike.

1) I highlight that text above.

2) I cut.

3) I attempt to paste elsewhere in the document.

4) It doesn't paste anything.

5) I go back and undo the cut, then highlight that text again.

6) I attempt to paste. It now works. I can paste that a third time if I choose so.

7) I then cut different text and attempt to paste. It doesn't paste anything. Rinse, repeat.

Using: Dreamweaver CS6 (Version 12.0 Build 5861)