DSP Mystery/not correct factory MID?

[X5P1]

Greetings, my first post here but this forum has already been invaluable to me, so thank you all.

I seem to have a peculiar issue with my factory sound system(or so I think)

I recently purchased my '03 4.4i and needless to say I am in love. Funny thing though, the radio has an echo to it I can't seem adjust. This then got me looking into aftermarket solutions (Avin/Dynavin) and learning about the whole DSP debacle.

According to my vin # I DO indeed have DSP on my vehicle and I can further appear to verify this with the presence of a factory sub in the rear right compartment.....but!! My HID does not have a DSP button on it.

What the bleep is going on