You may try running it empty to see if a high enough temp is even obtainable
Assuming your 2 burner plate is 1800 watts you are already at 15 amps so adding more electric heat may be a problem with your existing outlet

Agree with glen. My largest home build smoker has a 2400 watt 240 volt oven element as it’s heat source. It is hard wired to a dedicated circuit, but it also has the capacity to do fairly large batches.

If you have to operate from a dedicated 120 volt 20A circuit you may have one already you can use. If not, they are generally not too difficult to run.

My best guess is the element you have will raise the smoker up to 200 degrees easily when it is empty. What you will need to find is the maximum amount of product that it can hold and stay within the heating capacity limitations.

First is not having enough heating capacity to bring cool product up to the required internal temperature. The second is not enough internal volume needed for proper air flow past the product and out the flue for sufficient drying.

Definitely a few things to work on before my next batch I was just more concerned about the snack stick being safe to eat

It may be as simple as breaking your smoking down into two or three separate sessions.

After all the stuffing, load the smoker with fewer sticks. Put the others in a tub and refrigerate till the following day.

If the two-burner element is a typical 120 volt unit, I suspect it may not have enough wattage (thermal capacity) to bring 50 lbs of product up to the required max temp .

Have you successfully done 50 lb batches in the past?

Also, is it insulated? If not, heat losses are much higher than when using an insulated cabinet which compounds the problems from overloading.

Other than that im guessing the issue is somewhere in your processing or smoke/cook schedule