Let me start by saying for those who don't know and those who won't care anyway, I only throw Mvp/Axiom. So yes I'm a ridiculous fanguy (to old to be a boy)
When you have a choice between ordering 170's 160's or 150's for said mold. You specify you want 100 of them in 170's. Your order is fulfilled with 10 in the 170's and the rest is a mix of 160's and 150's. You have had a prior discussion to not fulfill the order with a substituted weight. Yes you would be pissed off and you have been boned.
I'm not saying I know anything about either side and this is pure speculation on my part. If this is however an issue it should and probably will be rectified. (eventually hopefully)
If I as a consumer order a disc advertised to be 173g and I'm sent a 163g disc I would be annoyed and want it to be corrected or at least discounted by the seller. Imagine that pia on a large scale and your livelihood is on the line, weak sauce.
Being a retailer either online, brick and mortar, or both is a tough go today. Margins are slim, competition is plentiful, and expenses are high. Not to mention selling MVP/Axiom comes with the added burden of trying to show every single color combo option to be competitive must be a lot of extra work for no more money than another brand.
I'm not one to criticize my favorite disc company but I feel for the retailers if this is an ongoing issue.