git svn dcommit sends to wrong branch

Commands:

git svn clone -s -r 1:HEAD http://svn/repo
cd repo
git commit [thrice, in master only]
git rebase --interactive HEAD~20 [i.e., started rebase in commits before
the clone]
[Merged two commits I had made *after* the clone]
git commit ...
git dcommit

This created commits on
<http://svn/repo/branches/branch_name>! Why? Is it because HEAD~20's
git-svn-id <http://svn/repo/branches/branch_name@22481> is on that
branch?

And more importantly, how do I "replay" my commits on trunk?

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