OOps I am sorry...
I meant to say, the golden calf thing did NOT happen before the situation in Ex. 19 (The Israelites shaking and anxious at the foot of the mountain.)
The watchtower mentions these two different situations, like if it was only one. The one with Moses coming down the mountain was indeed AFTER the golden calf.
By the way, is there any possibility to edit a post here? I hate mis typing (gold caf instead of golden calf) and would like to edit it!