When exporting historical membership info in RE Export (Using Gift and Constituent Export) the exported field ends up blank. This is the case when selecting specific memberships to export. When selecting ALL memberships the current membership gets exported and I might as well use the "Current Membership" fields. I checked this with the BB Tech Support and he duplicated the issue on his machine. I am posting it now so it can be fixed in later RE releases... hopefully soon.

(NOTE: The Tech was able to export specific membership info when using Membership Exports but that does not work in my scenario as I am using a gift export which is linked to a custom report.)