Take care of your blood preasure!honeybun wrote: My confusion lies in the fact that I was under the impression that as the TTI's indicator turned "dark" it meant the meals were aged or had recieved heat stress.

Everything is allright!
The TTI:

shows a red center if MRE´s are stored well. The dark "ring" is just a reference!
Read at Naticks homepage:
Each TTI consists of an outer reference ring and an inner circle. The inner circle darkens with time, and darkens more quickly as the temperature increases. The quality of food products is very dependent on the time and temperature of storage — so the darker the circle, the less fresh the food.