Some Other Perhapses, Don L’Chaf Zchus
1) Why are the frum wine/liquor stores continuing to sell these whiskeys, which have been determined by a reputable Kashrus organization to be assur b’hana- forbidden to have any benefit from them?
Perhaps as Wolf said
Perhaps they hold by a different Kashrus organization
Perhaps it was an (almost)unavoidable mistake
Perhaps there is another reason which they could explain to you
2)Why the “look” from a frum employee when someone is trying to do the right thing
Perhaps you misunderstood the “look”
Perhaps even you read the look correctly, it was in response to something he perceived as unwarranted in your behavior