Unusual - and intermittent - selection behavior in DW

I'm on a Mac with the latest version of DW. After resetting preferences to no avail, restarting my mac, and uninstalling and reinstalling the app, I continue to experience the following:

1) Trying to open any menu with a click does nothing. If I double-click, I'll see the menu appear briefly but I don't have the opportunity to actually select a menu item or have the menu persist.

2) Moving my cursor into the code in code view isn't predictable. For instance, I can click between two empty paragraph brackets and it'll select the > of the first p tag and the < of the second. It's not letting me simply click within and start typing.

3) Trying to select lines of code sometimes works and sometimes doesn't.

Any ideas? This was working just fine for hours this morning and then noon hits and chaos ensues.