[officialtony]

If it is as you described with the lock above the shoulder and only the head and arm are contained, locking hands does not become an issue.
Woolnojg is correct in his assessment.
What is at issue may be an illegal headlock. . . . . different acts which both get the same result - stoppage of match and one point penalty assessed.
Stopage for illegal headlock is immediate - illegal hold. Stoppage for locked hands is delayed until it is clear the bottom man cannot gain an escape or reversal from his position in a reasonable amount of time.
I have seen this frequently with middle school wrestlers and have to watch it develop to see what we have that may be potentially dangerous or illegal.

Hope this helps to make the situation a little more clear for you.