Need help with autosorting system(Filter issue)

[Milkshakes00]

I have this setup going right now:
http://i.imgur.com/tDr27no.png

It used to work fine, but for some reason it hasn't worked since a server restart.

The first filter (next to the ender chest) pumps out items fine.
The second filter is the problematic filter. After an item hits the router, the filter won't pull it out and push it through the pneumatic tubes. It gets stuck in the 'redstone on' position, and I have to break the filter to get my item out of it.

Any idea as to why this second filter is now messing up? I've tried normal and redstone pneumatic tubing. Have tried upgrades and no upgrades on the router. All the barrels are full.

 

[Omicron]

If it gets stuck in the "redstone on" position, that means the filter is jammed. It managed to pull the item from the router alright, but it cannot find anywhere to send it. In other words, there is no valid inventory anywhere in the connected tube network that will accept this kind of item.

Possible reasons:
- A necessary inventory or machine filled up, is backlogged, or ran out of power
- A tube accidentally got broken, severing access to the necessary inventory
- A tube was colored and now no longer lets other colors pass
- An item you did not expect or plan for enters the system
- An inline transposer/filter/etc is receiving an unintended redstone signal, sealing off the item transit

 

[Milkshakes00]

If it gets stuck in the "redstone on" position, that means the filter is jammed. It managed to pull the item from the router alright, but it cannot find anywhere to send it. In other words, there is no valid inventory anywhere in the connected tube network that will accept this kind of item.

Possible reasons:
- A necessary inventory or machine filled up, is backlogged, or ran out of power
- A tube accidentally got broken, severing access to the necessary inventory
- A tube was colored and now no longer lets other colors pass
- An item you did not expect or plan for enters the system
- An inline transposer/filter/etc is receiving an unintended redstone signal, sealing off the item transit

Thanks a ton.

Somehow, somewhere along the line, a single block of the tubing broke, and I never thought the check it. Thought the filter would just pump it anyway, and the tubing would shoot it out onto the ground.

 

[Omicron]

Buildcraft pipes would do that. In each pipe segment, an item determines where to go next by examining available exits. One exit? Go there. Two exits? Random 50/50 chance. Three exits? Random 33/33/33. Diamond pipe has filter? Go this way, and do not go that way and that other way. Iron pipe? Go through single exit. Void pipe? Go straight to jail, do not pass go. No exit or blocked exit? Pipe ends -> drop to ground. By this method, an item gets passed from pipe section to pipe section like via a bucket brigade until it arrives somewhere, but it will never care about its original sender or its intended destination.

Pneumatic tubes, however, refuse to transmit unless there is a valid destination. They pre-compute the path the item will take, then (and only then) launch it. At every intersection, the item asks, 'is my path still valid?' If yes, continue. If not, calculate closest alternate destination and go there (even if it means going backwards). If no alternate destination is valid, return to sender.