Board Thread:Questions and Answers/@comment-84.253.250.236-20130626164818/@comment-174.131.36.5-20130627155458

Take the itemsink module out of your 'overflow chest' chassis and reset it by 'crafting' it. Replace it in the logistics chassis and click 'Default:   Yes' again.

I had a card the other night that looked like it was the default path in the GUI but I had items popping out of the pipes as well.