Subtree Split Bug - Irrelevant Commits Included in History

Subtree Split has a bug in which irrelevant commits are included in
the sub-project's history.  Along with breaking compatibility with
branches created before the bug was introduced, this significantly and
unnecessarily bloats the sub-project's git repository.

I contacted this group about a this bug back in April and later
followed up with a reproducible test case.  However, I've failed to
get a response or traction, despite the significance of the bug.

My previous emails, including the reproduction steps, can be found in
the archives:
http://lists-archives.com/git/875747-subtree-split-includes-commits-outside-prefix-directory.html

Regards,
- Harpreet "Eli" Sangha