Well it's not likely the box since on a similar box for Alpine and Kenwood both will display the needed so it seem to be more a retarded thing with Pioneer than with the makers of the box.
And Im not going to return the Sirius since I like them and don't have to pay for a subscription due to their mistake.
I just don't understand how a company could let such a crappy limitation that affects the entire product line of Pioneer continue with out a simple resolution.