Inconsistent product availability info in the web site

This is specifically re Liquorshop/liquor in the web site. Sometimes - repeat, sometimes - when I'm looking for Beck's Green Beer the web site displays stores where the product is available - as happened this morning. Presumably with reference to my location in Primrose, Germiston, the site informed me that Becks Green is available at Hyper Newmarket (Alberton), The Glen (Jhbg South) and Southgate (also Jhbg South)\. But when I re-visit it does not give this info. Likewise, if I change my preferred store, it does not give availability info. Further, Checkers feeding me with product availability info is rather "top down". It would help if there was functionality in ther web site screen through which I could "shop around" online to find where the sought product is available in light of the erratic info feed from their side