Exporting fields to excel (doesnt bring all fields)

[Jon]

Hi

I try to export my issues to excel and select current fields but it gives me a excel file that is missing certain fields. What am I doing wrong? 

[Jack Brickey]

what fields? Some 'fields' are actually calculated and don't import. Also I assume you are using "export all fields" option?

[Jon]

they are custom fields but we used different custom fields for each time we export. we are using export current fields option.