Google Analytics - API Default Channel Grouping Problem

[StaDiuM]

Hello! 

First off, thanks for reading and sharing your expertise. I'm a new Power BI user and running into some trouble with Google Analytics.

I connected GA to the desktop version of Power BI pulling in: 

• % New Sessions
• Avg. time on Page
• Bounce Rate
• Day of the month
• Goal Completion
• Goal Completion rate
• Hour
• Month of the year
• New Users
• Sessions
• Week of the Year
• Year

Until i pull just thease date evrything correct

If i add 

• Default Channel Grouping

The data in BI doesn't match GA. What could possibly be causing this error? 

And  how to solve it ? 

[WayneW2]

Can someone please answer this; I've encoutered the same problem. 

Whenever I try to add the channel grouping to my data sets, it causes discrepancies in the data when compared to their source.

Did you ever get an answer for this? Somebody, anybody