[Orgmode] refiling to self corrupts buffer

[Samuel Wales]

Previously I reported that refiling a task to itself deletes the task,
and that was fixed.  It seems broken again.

It might be nice to distribute a test case with org.

Also, if you refile an active region to the first node in the active
region, org will attempt to put all of the nodes there.  This corrupts
the buffer, in my experience.

Perhaps org could error in both situations.

Please let me know if you need details.

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