Same issue again at SAN today. Dogs in use so everyone had TSA-pre AND lines were long for every single line and no one knew how to go through. No dedicated line for true TSA-pre customers, i.e. those of us who have paid for it, and no line for First class/Priority. And my GE did not work last week and I manually input the GC number and it did not take. Yep, pretty certain that I will not be paying for this farce of a system again. I do have the UK Registered Traveler program and I get straight through immigration in the UK - easy process, cheaper than the US GE system and it works for this non-UK citizen.
So when they wonder why less people choose GE/TSA-pre they will only have themselves to blame. Make it free to everyone and have an INS entry system that does not work - why would I pay for this again??