Seems lots of discussion about whether to call standard household electricity single or two phase is taking place. Personally I think if one leg is a sine wave, and the other leg is an inverted sine wave, that would be two phase because they are 180 degrees apart. Maybe technically from the viewpoint of an electrician, it's single phase because a two phase system is wired differently.
From the description about how the burners (and oven) temp is controlled, the current is constant (except when it's cycling off once temp is reached). This would match what I measured because the current remained constant for the short time I had the oven on.
If the spring pushes against a heating element, then why do the plastic knobs not get hot?
Unfortunately I'm still uncertain why the oven current measured the same on each leg, however, the top burners had different current on each leg. I may need to move the stove to see if it's a three or four prong outlet. From reading posts, it seems it must be four because it has a clock and light indicating it also needs 120V.
If you read my original post, one of the burners (the largest one) had 15A on one "phase" and the other "phase" had 8.3A (almost half). Keep in mind, I didn't stop and smell the roses while in the electrical box, so maybe the heating element caused the current to change, so that 15A may have increased a bit to 16.6A from the time I switched the clamp on meter to the other "phase", or I measured the 8.3A first, went to switch "phases", and during that time the current decreased to 15A from 16.6A.
Had I measured the other "phase" again, maybe it would have been 7.5A.
Just throwing that out there so less confusion exists.