If a store claims that Apple isn't giving them enough product, and therefore Apple is favoring their own stores, then I think it boils down to two things:
- Has the store provided sufficient evidence to Apple proving what kind of demand they have, thereby establishing the shipment quantities they need?
- Assuming Apple has this information from all such stores, have they responded appropriately and to the best of their ability?
The way reseller deals tend to work is that you buy the product at a discount and are permitted to 'resell' it at up to the company pricing. You generally can't go over the company pricing and you may have limited on how far you can discount as well as other rules like you can't put beta software on the gear, can't advertise them with other company software pre installed (but you could offer a set up service that might include installing software they just bought from you). Often there are minimum unit requirements to orders, rules that you can't return unsold product and yes even clauses that if the company puts in their own store in the area you may not be able to receive newer product because internal stores have first pick.
So the deal here could be that Apple won't change their rules or their pricing and the resellers feel this isn't right because now with a 'real' Apple store they aren't making the money needed to order the product and they feel that Apple, who might be completely legal in their rules and complying with signed contracts, so be made to change because it's not 'morally right'. Ie inferring they have a duty to help these companies succeed even at a business loss to themselves. Not unlike the US Senate, when called out that it is the laws they passed that allow Apple to have overseas subsidiaries for overseas profits, basically said 'well yeah that's the law but we don't think you should be using it.'