A student cannot take more than one PE class. They CAN and DO frequently take more than one PE CREDIT class at the time.
Otherwise kids couldn't be in Athletics and Band at the same time. Or Dance and Cheer. Or JROTC and PE. And all three of those are common pairings.
And even with PE - they have multiple "types" of PE classes they can take - "Indoor & Outdoor Education" "Personal Fitness" and the like, and admins can skirt around this.