if anyone missed it, clearly the issue was not anything other than me missing the fact the probe had gotten knocked down. I am proud and honestly astounded, that the smoker as of right now is still at 255F, 18hrs and 45 minutes into this same load of Stubbs briquettes!   The pork shoulder was done this afternoon - I used Chris Lilly's pork shoulder rub recipe that I found on this site...with slightly reduced salt - absolutely awesome.  I found a local source that gets fresh pork from Sandusky ohio..never frozen, and he guaranteed 'it was killed the same week I have it'. No idea - but I can definitely say with the same prep, rub, method, this was my best one yet.  The spares have about 40 minutes left and we will be munchin!  Thanks for all the input guys.. I can't say enough good things about my wsm/cyber-q setup...truly set it and forget it (minus moronic errors ! haha)