What am I doing that is wrong with installing spark plugs? Need help

What am I doing that is wrong with installing spark plugs? Need help

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Ok so I did my second spark plug replacement 14k after the last set because I am tuned. When I went to do my spark plugs 2 of the 6 I could turn by hand without a ratchet. I know the last time I torqued them to exactly 17 ft lbs as per procedure. Am I missing something? This time I torqued them to 20 ft lbs.

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What am I doing that is wrong with installing spark plugs? Need help