I think the new PO is here (https://www.argyllshireadvertiser.co.uk/2023/08/22/new-full-time-inveraray-post-office-opens/) and the one on in the Londis on Dalamally Road has closed https://www.openstreetmap.org/node/5909497279. The old McColls was one building out so have moved it, BUT not updated tags