So the sign says "100", the police read your speed at "112" but the device has a 5% MoE and in this case your actual speed was 107. Seems like you have exactly the same problem because the laws state the actual speed limit was "110" which you are under, despite being over the posted limit and the police reading you as over both the real and posted limits.

Why does the sign say 100 when the actual limit was 110?