I thought the SR5 only came with a v6, as sr5 was the model with many options including the v6 but just short of the limited as far as options.
Even within the sr5 there were options...leather, locker etc
and the 99 and 2000 had the highlander edition labeled as an sr5
I also agree you can see these cars with badges people have put on to make them appear better or worth more,in all my years I have seen several "Limiteds" that were not "Limited's"