Running DNN 8.0.4 and Revindex 11.0.0

I'm trying to use the Packages/Packing feature and it doesn't work the way I expected when when an order requires more than one Package.

In the Packing Configuration, I have chosen "Volume Fit" as the Packing Rule with a 90% Fill Factor.

Then, I created a product with the following shipping setup:

Weight (lb): 4.1
Width (in): 3.7
Height (in): 4.7
Depth (in): 37.7
Package type: Box

Finally, I setup the following three "Box" Packages:

1 Pack Box - 4x5x38
Weight (lb): 3.0
Width (in): 4.00
Height (in): 5.00
Depth (in): 38.00
Internal width (in): 4.00
Internal height (in): 5.00
Internal depth (in): 38.00
Max weight capacity (lb): 9.00
Max quantity capacity: 1

2 Pack Box - 5x8x38
Weight (lb): 3.40
Width (in): 5.00
Height (in): 8.00
Depth (in): 38.00
Internal width (in): 5.00
Internal height (in): 8.00
Internal depth (in): 38.00
Max weight capacity (lb): 18.00
Max quantity capacity: 2

6 Pack Box - 8x10x40
Weight (lb): 4.00
Width (in): 8.00
Height (in): 10.00
Depth (in): 40.00
Internal width (in): 8.00
Internal height (in): 10.00
Internal depth (in): 40.00
Max weight capacity (lb): 35.00
Max quantity capacity: 6

If I order 1 to 6 Products, the Packing Rule Works fine and selects the correct Package.

If I place an order for 7 units of the Product, I expected the Packing Rule to use one 6 Pack Box and one 1 Pack Box. Instead, two 6 Pack Box are used with 4 Units going into one box and 3 in the other.

Please advise.