PowerBI Total Line is not summing up correctly

[JuliusKairion]

Hey, I have a pretty major problem currently: The total sum of a column is not summing up correctly. Here an example with just the automaticly sumed up values at the end:

Both columns are no formula, they are just summed up raw data. If I export the table to Excel, it's summed up correctly, so the individual sums are correct. 

Also percentage looks pretty wrong:

The September column are full numbers, the Campaign Product column are Strings.

Anybody else facing this problem? Any solution for this? Is it a bug or did I do something wrong?

[v-chuncz-msft]

@JuliusKairion 

You may check default summarization and use Performance Analyzer to view query.