Using PBI dataset as a data source for PBI report builder: Problem with evaluating measures

Hi!

So I've PBI desktop report that is good to go. But I also need a paginated version of that report. So I use the desktop report's dataset as a data source. (I first uploaded the desktop report to premium capacity worksplace obviously.) And almost all is fine, except some measure, quite simple measures like:
genericMeasure= calculate( sum(table[column]), firstdate(Calendar[date])) gives nonsensically high numbers. Where as some just like it give the same values as in desktop.
Any ideas how to proceed? 

Thanks all'ya!