So I've gotten about 50 miles on a brand new set of keen sandals with brand new SPD cleats and have had to readjust the cleat going on three times already because it seems the cleat is moving. The cleat of course has teeth to grip the sole of the shoe and I've tightened the retaining bolts to what I thing is a reasonable level but I've noticed that my heel keeps finding itself further and further out as the cleat rotates from clipping out. I've backed off the tension on all 4 places on my XC style shimano SPD pedals but as soon as I get home from work today I'm going to yet again have to readjust the cleat. The only thing I can think of so far is that I'm using the phillips retaining bolts that came with the shoe, not allen bolts that usually come with the cleat. Could it be that the allen head isn't allowing me to apply enough torque?