Last tick on locked repeater turns repeater texture into comparator texture

Basically, I was making a Minecraft map and I was locking a repeater. While it was locked, I turned it to the last tick on the repeater. When I did, the repeater texture turned into the comparator texture.

What I expected to happen was... for it to just be the normal repeater texture, not the comparator.

What actually happened was... it turned to the comparator texture.

Steps to reproduce...
1. Watch Sethbling's video on how to lock a repeater (http://youtu.be/sUjkuhBY3Gw)
2. Turn the repeater to the last tick(as seen in the attachments)
3. You shall notice the bug