Addition equation subtracts... WHY?

Well this means that your code "features" another bug somewhere..
Because it has to be OrdersTotal()-1.
Every working code does it like that and also the fact that your program did not work correctly is proof of that very fact.
Think of it: OrdersTotal() returns the amount of orders, so, if, say, you have 3 orders then OrdersTotal() will return 3;
however, the position of orders starts at 0 meaning:
order 1 will have the position 0, thus, order 3 will reside at position 2 when accessed with OrderSelect() by position.
Now, if you excluded your calculation from the loop then the logical error might not affect the calculation indeed.

I see the logic of this. The calculation of weighted average price and number of total lots is included in the "for" loop. The calculation of limit and open position profit/loss occurs outside the loop.

If I understand you correctly, the addition of "-1" should NOT affect the number of lots the code finds, it only affects where the counting begins. Instead of beginning from zero (0) it begins from "0-1". But if it does not affect the number of lots found, how is the addition of the "-1" advantageous? I can see it from the stand point of closing lots, but not from the stand point of totaling lots...I'm a little confused. I will place this back into the code and see what shakes out.

Interesting...After I placed the "-1" into the OrdersTotal() line, I see no affect on how the EA functions...it is now calculating as it did before. The limit and pl calculation remain inside the bools for Long and Short. When I place them outside again, I get the same problem...the EA calculates incorrectly but only from the long side. I am now convinced, that this was the error. The limit and pl calculations for each side of the market but remain inside the bool marking them as such, thereby keeping the arithmetic correct. Otherwise, the EA will calculate the code in order of appearance, and if the short side comes after the long side, and it NOT contained inside a bool to restrict it, the calculation will revert to the most recent...in this case the short side.

As long as you do not close orders you can also count the other way around, i.e.: