drop shadow & duplicated layers

in order to print 2 per 8.5x11 page, i duplicated each existing layer. for a specific reason, i rotated the entire(layers linked) lower image 180 degrees. the drop shadow of one of the original layers was duplicated with the duplicated layer. but what ever the angle of the original layer's drop shadow is, controls the duplicated layer's drop shadow. so if the upper page's (layer) images's drop shadow is below the object, the lower page's rotated duplicate (layer) image is ABOVE the object! the 2 drop shadow effects on the 2 different layers are somehow acting as ONE!
how can i get the drop shadows to act independently?

In the layer styles dialog, turn off Global Light.

thank you so very much!!!