Repeater not updating subtotal element

This is, so far, a great looking form creator with a lot of potential. I am trying to figure out the calculated & conditional field options for a subtotal.

In one field, I calculate the square feet of a set of dimensions.

In my subtotal field, I am using calculation routines because certain square feet will have a different price – so, 0-3 sq ft will be one price, 3-9 sq ft will be another price, etc. Then, I am using the conditional field setup for my subtotal to enable the calc routine if the square feet is between the appropriate ranges.

This is on my main form, I added a repeater “Wrapper Form”. When I view the wrapper form and enter my data, it works on the first item only. When I (ADD) another to calculate, it only calculates the subtotal from the first group. No matter what square feet is in the 2nd, 3rd… repeated groups, only the first group is calculated.

What am I missing?

Thanks!
Mike