3 CAT XL layers with strange net losses

[aiste-kalinauskaite]

I ran 3 CAT XL layers, and was expecting net loss to be 325 (ceding 75 to reinsurer), but got 350.

Layers run: I ran 3 stacked layers (inuring priority = 1,1,1; ReinsLayerNumber = 1,2,3):

50 xs 50 50 xs 100 50 xs 150 all with % placed = 0.5

P.S. Same result if I use ReinsLayerNumber = 1,1,1

[sambles]

same as issue #39