Has anyone found a solution for when an item fails to get added to the cart (on clicking the 'add button') and then shows 'Maximum allowed is 1' :?
yup. Make sure you are logged in, and then add another random item to your cart, click on the cart and remove the random item you don't want, and you should be left with the item you do need.
Tyvm, I went to do this and just as I clicked the 'add' button it showed 1 item in the cart (went to 2.) So not sure if this fixed it or it sorted itself out eventually, either way I'm happy :)