Wierd Minimal Blender behavior

[zaknafain]

Hey, so i've build a couple of circuits, and so far, they work just fine.
Apparently im still having trouble with the basics:
http://seanm.ca/stomp/minblend.html
I've build this circuit a couple of times, and the potentiometer is behaving wierd everytime i try.
When I dial the potentiometer to a middle position where its blending both signals 50/50, I only get a very weak signal (barely audible). If I dial it all the way up or down, its giving me a loud signal, either from the effectsloop or the buffer, so that part seems to work.

So my first question:
Is this circuit supposed to have this volume drop, or am I doing it wrong?

[~arph]

This happens when both signals you are blending are out of phase,so they cancel each other out. You need a more complex blender, like the splitter blend on rog. Btw, a volume drop at 50/50 is normal in this design, even with non canceling signals. You can try an inverting effect in the loop. See if it is as weak then.