Wasn't sore after Emsculpt using 2 paddles - should I be concerned it wasn't effective?

I have a smaller waist but was given 2 paddles for my first 3 of 4 neo sessions. I felt no soreness during and after those sessions. My last session was 1 paddle and it actually felt like I got a workout and my muscles were sore the day after. Should I be concerned that the application wasn’t correct and that the treatments need to be repeated? I’m very worried that my waist was too small for two paddles, therefore not giving proper muscle contractions. Thank you.