Sfemg

Hello! I recently had a sfemg. In the frontalis I had 3 abnormally high jitters out of 20 pairs, but one of them was "uncertain".
Then they tested orbicularis oculi and the 18 pairs of this muscle was all normal.

So the frontalis alone had 18% abnormalities and the OO had 0%.
And here is my question: they combined the result from frontalis and OO, and said that with all the 38 pairs in totak, the 3 abnormal pairs was under 10%.

Is this correct? Or is the test in fact positive if ONE muscle is above 10%, regardless of the other muscle?