It may very well be. The system relies upon a memory retention battery that will eventually fail. With the storms that Virginia has encountered over the past several days, it's more than likely that power was interrupted at some point. Even if for only a second, that would be enough to cause the stored data to get mixed up. It's not a field-replaceable battery, so with the exception of a good on-line UPS, you are correct. The DHS KSU is getting tired and either needs refurbishing or replacement.
Let's remember that this system has been discontinued for many years, so it has done pretty well when you consider the fact that it is easily ten years old.
