Ribbon Chart and Custom Column

Hi, 

I have a calendar table that is feeding from data flows, using a fiscal year column of that table, I created a custom colum Fiscal Year (FY) to modify the format. Next, created a ribbon chart using Fiscal Year as X-axis, all data is correct, when switching X-axis to Fiscal Year (FY) totals change, labels appear the same. What could be the issue? Nothing changes besides the X-axis column.