Well the LCS can do what they like. It's their shop, their rules. They make money off people opening files and starting subscriptions.
You buying all 15 would make them some quick cash but they would rather have 15 people come in and buy it and open a file. Also, it's nice to have copies of titles available to people who are customers at their shop.
If they have a 2x limit rule then they should display it. That would be mine only gripe.
obviously LCS can do what they like, i agree with that.
I just wished they would display their "limit rule"