hi kevin
i feel this is a normal behaviour coz Tiny rom is assigned to do no of functions liks to do POST,to load and boot an ios from flash.
as we see in show flash command ios code and tinyrom resides in flash.
The reason the system image is being pointed towards tiny rom is that it does contain the boot file details..
i do have some 805 routers and i see the same kinda behaviour..
regds