Hello, I wasn't sure where to post this, but whatever.
I can't explain this in words, so just watch this YouTube-vid: http://www.youtube.com/watch?v=hTXXeZHADxY
It's as if the machine accept multiple blocks (even though its 63/64, so it should only accept one), which makes it spit it back out again, instead of going back into the pipe. This also happens if it tries to load 2 different blocks at once.
Is there any way to solve this? It is very annoying as I have to baby-sit the machines.