Thank you guys!
I have four blogs and I signed each for entrecard using 4 different email addresses. It wasn’t easy remembering my password for each especially the first week so I chose one password for all. But logging in and out of the system made me go lazy doing drops, sometimes I don’t do any.
So when I received the email from entrecard about how one can switch to their other blogs by linking them, I was really relieved. It was very convenient going from one blog to another bloghopping through all entrecard listed blogs.