I’m sure there used to be a thread to post problems with the main TWS website but I’ll be darned if I can find it! Anyway, @laura, here’s one for you to pass on.
I just stumbled on an anomaly when searching for half bottles. There currently appear to be 47 different products with the bottle size descriptor “37.50CL (HALF BOTTLE)” as well as another 4 with the descriptor “37.50CL”. So if you search the first one you see all half bottles in the list except those 4 with the slightly different descriptor.