Why does my AE Crafting System lose its jobs when I'm no longer present?

I've had this bug before in FTB Unleashed. Be sure to update AE as recent as you can without changing to 1.6 (Unhinged is 1.5) from the author's download site; the mod author is very good about releasing frequent updates and bugfixes. I think this has to do with the crafting monitor itself. I don't believe I found a permanent solution when I had this, but I did find a workaround. Try hooking up all parts of your ME network to go through a single ME Cable. When it decides to stop building, just break and replace the cable. All build progress will be lost, but the materials used and created so far are kept.