Description of the Bug:
When using a Rope Pulley with a double chest of this mod the chest will split creating 2 individual resulting in doubling the loot as long the item is in the top half of the first chest inventory. If its in the bottom half all items will simply drop.
Video of creating the bug

This is duplicate of P3pp3rF1y/SophisticatedStorage#449

There is now a Sophisticated Storage Create Integration mod that adds full blown integration with create and doesn't suffer from item dupe / loss issues