I just did the same exercise-----5yd MacIntyre Old Hunting Modern 16oz glena and got 244 with the xmts discount and 273 without. Seems to be working fine for me. Accessed through above Scotweb ad to get xmts discount, chose the fabric first, then products from that fabric, then kilts, then 5yd casual== displays price of 244, then cleared discounts===displays price of 273.

I too have been following closely the price and availability of several items as the pound sterling has nosedived against the dollar in the last few months, but appears to have stabilized the last month or so at around 1.4:1 $:GBP. Some great deals to be had if you are able to fiscally handle the shopping now.