In the instructionals I have watched to make Indian candy, I was also amazed at how much honey, sugar, molasses, etc was used to brine. Did you use copious amounts of sweet to make yours? I believe this to be the secret to the gummy and sticky consistency.
I have found that a flakey consistency comes from the perfect level of dryness and salinity...difficult to achieve with so many variable in the process and especially using the Chief smokers.
By using the box to insulate in the summer most definitely caused the internal temperature to spike and also give you a unrealistic idea of how long the smoking process should take.
However, to smoke in the current cold wet weather you need to use the box and smoke for a minimum of 9 hours...I would guess even longer 10-11hours. It sounds like you prefer the typical store bought smoke salmon consistency, not the wet lox style. Also, don't open the smoker to check during the main cooking time as the frequent temperature losses will affect the time needed to finish the cook. And, If the smoker doesn't reach a minimum temperature it will not kill the parasites that may be in your fish.
A pellicle will not form properly in the fridge, and its not a good idea to leave the fish out of a brine for too long...even in the fridge. 1 hour at room temperature on elevated racks is sufficient...even better with a fan blowing over the racks.