"Resolve Using Theirs" does the same thing as "Resolve Using Mine"

Rebase with a conflict. Right-click the conflict and "Resolve Using Mine." The diff will show, as expected, that the conflict was resolved using your own side of the branch. (See attachment: Screen Shot 2014-04-07 at 10.25.52 AM.png).

Abort the rebase to start over. This time, "Resolve Using Theirs." The diff shows that "Mine" overwrote "Theirs" rather than "Theirs" overwriting "Mine." (See attachment: Screen Shot 2014-04-07 at 10.27.10 AM.png)

I've been able to reproduce this a few times and maybe I just don't understand Mine vs. Theirs, but I am under the impression that when I choose "Theirs" the code I'm rebasing with should overwrite my own.

Screenshots of my workflow are attached in the order that reproduces what I think is a bug, but again, if my understanding is wrong, please let me know and feel free to close the issue. (Sorry, somehow I attached the same screenshot twice in a row.)

I've marked this as "Critical" only because, without inspection, it can be very easy to finish the rebase and overwrite the code you intended to keep, effectively losing data.