Open Radar

 
Summary:
I have some apps installed via the Mac App Store from both Japan, and the US. When updates are available for apps from both countries' stores, the experience is terrible: I'm forced to login using a particular Apple ID, and end up only getting bounced between the JP/US stores as the app forces me to change stores upon authentication.

Steps to Reproduce:
1. Have multiple apps needing updates, from the JP/US stores.
2. Click "Update All."

Expected Results:
1. AppStore.app should ask me to authenticate both accounts.
2. AppStore.app should then update all apps, across both stores. 

Actual Results:
1. As I authenticate to one country's store, I'm forced to the "Featured" tab of that country's store.
2. When I click back to the Updates tab, clicking Update All again sends me back to step one, but for the other store.

Version:
OS X Yosemite 10.10.1 14B17

Notes:
The authentication prompt provided by App Store.app does not allow me to specify the correct Apple ID for the currently-logged-in store. It forces one of them, with no indication as to why it selected that particular one. 

Configuration:
MacBook Pro (Retina, 13-inch, Early 2013), no accessories attached.