Again, the float is not adjustable on those pedals. Either your tension is set too low, or your cleats/pedals are worn, or, you are moving your foot in some situations, indicating that the angle of your cleat might not be correct.
If you simply cannot pedal without using the 4 degrees of float inherent to those pedals, perhaps you need a pedal with less or adjustable float.
For now, watch what your feet are doing and when they are doing it. For example, when I first went to clipless I noticed a tendency for me to move the front of my feet outward, causing my heels to strike my cranks...I eliminated the problem by proper fit on the bike, adjusting the cleats to point my toes more inward by 'default' and adding shims to my cleats...not by going to a pedal with less float.
Finally, over the years I have noticed that when my spds start feeling loosey-goosey, it's because my cleats are worn, cleats are loose, pedals are worn or the tension is too loose.
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"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey