Cant log In from multiple devices

My wife and I each have the app on our iPhones and want to share one account so we can share a shopping list. But if you log in on a different device, the app kicks you out on all other devices and makes you enter your username and password to sign back in, which then kicks you out of the app on any other devices. So the app is unusable from multiple devices. Highly annoying.

Also, I am looking for furniture thats available in their standard "black-brown" color. However, when you filter by color, there is an option for "black", and a separate option for "brown", but no option for "black-brown".

JamesDVB about IKEA Store, v1.1.1