What version of Djblets are you using?
python-djblets-0.9.3-1.el7.noarch
Which module(s) have the problem?
Interdiff
What steps will reproduce the problem?
n/a. Can't submit diff to reproduce. Would point me to the exact module/function

so I could test more or add debug output.
What is the expected output? What do you see instead?
The expected out out is to mark lines moved upper as removed, not only as added.
What version of Python and Django?
Python 2.7.5

python-django-pipeline-1.3.24-1.el7.noarch

python2-django-multiselectfield-0.1.3-5.el7.noarch

python-django-evolution-0.7.6-1.el7.noarch

python-django-1.6.11-5.el7.noarch

python-django-bash-completion-1.6.11-5.el7.noarch

python-django-haystack-2.3.1-1.el7.noarch
Please provide any additional information below.
Git, own repo.

n/a