Commit 44ec473c199262d89b372d8a6cd35bed7672164d from Feb. 23 causes
org-set-tags-command to move the cursor forward 1 char when situated on
headline asterisks.

So if I am on the following level 1 headline with the cursor on the
asterisk as below...

* Headline
^

...and I call org-set-tags command, it moves the cursor forward one space:

* Headline                                      :tag:
 ^

This is causes problems with org-speed-keys, which requires that the
cursor remain on the headline.

This commit modified a previous change on Feb. 21
(450452de4b790706d187291f9f71a286f8f62004). But that commit also had
problems, since it would move the cursor one asterisk forward on
headlines > 1, thus also interfering with org-speed-keys. In my view
org-set-tags-command should not move the cursor except to fix the very
specific thing that commit 450452de4b was meant to fix: namely the
cursor moving when on a blank headline: i.e., from here...

*** 
    ^        

...to here...

***                                             :tag:
   ^

I've attached a patch that corrects the problem, but it would be ideal
if we figured out why the cursor is moving in the first place.

Best,

Matt