lol 2 WPMU Dev members workin on one website, switching dashboards

I was working on a test site with my WPMU Dev dashboard, i moved the test site from store1.myhome123.com.tw to myhome123.com.tw; These where both seperate installs not one multisite install.

I deactivated my dashboard and deleted it, the other WPMU Dev member installed his dashboard, but it came back to me, he could not even see it under the admin name he installed it with, but i could see it in my admin name.

Tried agian after deactivating all plugins and got the same result.