Those are all valid things that are wrong with this stupid statue. Any one of them would be reason to be upset, reason to write long and angry rants, reason to rally together and write Marvel and Sideshow Collectibles (and DC, just for good measure) for change.
But for me, my immediate first thought when I saw it, the thing which stuck out most as horrendously wrong, was that Peter Parker does his own damn laundry.
I mean, I guess MJ might do it once in awhile, but I've always gotten the feeling that Pete's the more domestic of the two. And either way, neither of them is going to be filling buckets with warm water and Tide in order to wash the Venom-spit out of the ol' red-and-blues, least of all Mary Jane. I think Peter would feel obligated to do his own laundry, that he'd feel guilty if Mary Jane had to do it for him. You know, with great odor comes great responsibility, that sort of thing.
I honestly have no idea who would pay money for this statue; you'd think the people who would be so desperate as to have a burning desire for it are the same ones who would be upset by a glaring continuity error like that.
There is one thing that would make this a little better: if Marvel and Sideshow teamed up to do a statuette with accomplished seamstress Peter Parker, dressed in some tighty-whiteys, sewing up all the rips in MJ's jeans.
And to be completely honest, I'd be far more likely to buy that, than the curvaceous cheesecake monstrosity above.