So being in mainland Europe, working with Office 360, I use the comma as my decimal point --> pi = 3,14 and not 3.14
I think my Alteryx settings are the same. In- and output with excel via "Input Data" and "Output Data" works like a charm.
However, when copying data from the Alteryx Results dialog (see screen-shot) to Excel, PI suddenly is 314.159.265.358.979
Included a few screen-shots to show what is happening.

