Board Thread:Questions and Answers/@comment-172.6.144.188-20130126031005/@comment-5885468-20130126090657

I was fiddling around with my system for a while now having almost the same problem. I noticed I colored some of my tubes differently. There are 2 pinks that look almost the same. That's what caused me issues earlier.

Make sure there's no glitches in color, and that your filter can send things that don't have a sorting feature somewhere. Make sure there is an output somewhere that can take the redstone too. They will only refuse to send an item if there is no location the item can go.