On 13 Oct 2016, at 2:13, Carpii UK wrote:

I seem to be ending up with two TM dock icons quite a bit lately, not 100%

sure but it seems to coincide with when I accept a LiveUpdate.

Do you have the “is running” indicator enabled for the dock, and if so, does it show only one of the two instances running?

What if you right-click the dock-icon and select Options → Show in Finder, do the two dock icons point to the same location?

The way the updating works is that it actually writes a new Contents folder inside TextMate.app, so there are never two TextMate.app files on the disk, so it would be surprising if the system still manages to see two (unique) versions.

That said, there has been issues in the past with multiple TextMate.app entries in Finder’s Open With menu, but that was before I started overwriting Contents instead of writing a new TextMate.app.