[sasmithjr]

For another perspective, if you put 22.5lbs on each side of the bar, you wouldn't call that a "1 plate" lift even though both sides add up to 45 lbs. There are no plates involved in the lift, thus it's not a "1 plate" lift.

If you search "1 plate overhead press" or "1 plate ohp", you'll see many references to how that's a 135lb lift.