Multiple update notifications from Android Market
I guess this is by design as the majority of users don't have 4 accounts on their phone. The whole idea of those messages is to give the user the opportunity to download a new version as soon as it comes out. You may not want to use your mobile data when you don't want it to. Maybe the update automatically tickbox would bypass this message, however it will probably still say that 3 updates have been applied.

So what you maybe looking for is silent updates https://stackoverflow.com/questions/10328471/can-we-do-silent-updation-for-android-application looks like you can do it with a rooted phone.

I too think that Google can handle multiple accounts in a more intuitive ways across their products. Since its out of our control to improve these closed source apps ourselves I will say its better than it used to be. I think the best solution for Google would be to combine these messages into one notification ie "5 apps have been updated".

Make some noise on the Google support pages to improve this UX, this may be a good start http://www.google.com/support/forum/p/Google+Mobile/label?lid=551c5c4cca827a18&amp;hl=en