The Unity 5.6 Editor is incorrectly showing anchor preset settings for rect transforms. It almost always says custom/custom except for a few selections, which are also incorrect.
Here is a youtube uploaded screen recording showing the correct behavior in 5.5.2p4 vs the issue in 5.6 f2 (though the problem existed before in the 5.6bX releases)
Is anyone else seeing this also? I’ve tried multiple computers and clean installs.