That's it the on single foot guides - the foot goes towards the butt/handle section. As for the stripping guide Likely the double foot you speak of it depends on who you ask as to what answer you'll get.

I suspect this is a stripping guide that has one foot on one side and then a foot with braces on the other side. I have placed these guides both ways and do not notice a difference in performance. I seem to recollect a thread on this board concerning the direction of these types of stripping guide and no real conclusion was made. I do recall when I was trying to figure this out myself I found manufacturers placing them differently also depending on the brand.