Plug torque etc.

Hi. Sorry, long post here. I switched out my front /rear differentials, transfer case, and manual tran. oil from the stock dino to synthetic oil about a year and a half a go. I tightened the plugs to what I thought was right. I am now at 30k miles and I'm going back to check my levels. Seeing the torque specs in my haynes manual I see that I tightened them way too much(no stripping, but much greater than spec) . Should I tighten them to the spec this second time or tighten them back to how I had them.

 

Torque to spec and use a new washer/gasket for each plug.