Cloud RDNG Access via (IE 11) vs (Google & FireFox)?

In Late Feb, via my default IE 11 browser and via Jazz.net:  I created a RDNG Cloud account: Via  Requirements Management, I’ve created Projects, EXPORTed, IMPORTed, Linked Modules, gave myself Admin Privileges, etc.   The Jazz folks event sent me an email with Convenient Link to my Requirements Management,

ISSUE: 
Today, using FireFox & Google, I logged in via Jazz.net access my Cloud RDNG.  Navigated to my RDNG’s Requirements Management: It shows that I only have “View” access to the “Adaptive Cruise Control Requirements” project: I have no access, no permissions to this projects, can’t create projects, and my earlier projects and permissions are non-accessible.  "Nada" 

SOLUTION: 

After making Google my default browser, I clicked on the RM's Link 3that is in my old Email from Jazz folks:

Problem Solved! 

All of my work is available.

QUESTION: 

To understand the “Whys”…Is there a Logical Explanation to this madness?  L