I know a few people who have been recommended the wrong type of shoes in a running shop, it seems quite common on running forums too. Im not sure if its down to the staff, or that you cant run properly in a shop. Most big brands have guides on their websites as to what kind of shoe you need based on arch height, tread wear patterns etc and they seem quite accurate.
Fortunately for me my physio is a sports biomechanics expert,and is pretty hot in this field,I still find it hard to understand the full value of his explanation of my need for my running,but it is working,and he is in the process of emailing the running shop with the full explanation of his prescribed opinion,
I have had orphapedic insoles moulded and adjusted and placed in a old pair of neuteral runners,till we get a result on my new ones,and slowly building up time in the insoles,I am load bearing all my leg muscle groups with regular visits to my physio,though this is pain full it helps with the transition of any tight cycling muscles to ensure they are flexible for the tonnage going through my joints in running,
Wet foot gauge does not always work as I have found out!as mine would show a supportive shoe,and its defiantly wrong,10 minutes with my chap face down on his couch looking foot fall, and walking up and down will look at hard skin patterns seems to get the best idea of shoe set up needs,the cost is higher but the hope for a eventual pain less
Running future is the aim,but he battle with the shop still continues as they have gone quiet