After clicking the activation link, device opens the same app twice

[wpangxin]

Hi, after clicking the activation link in my email inside gmail , a dialog box is shown to ask if I want to open this link using a browser or my own app. I click on the icon of my own app, and instead of being direct to my already opened app ( the 1st one ), the device switch on the same app ( the 2nd one ) and lead me to the homepage where it shows all the button for the various login method.

I am having two my app of the same thing being turn on in my device and running concurrently. What is the problem here?

I am using Android in this test.