It may be the same issue as #338258: CSV exporting of multiple values in fields → reported some time ago for 5.x
If there is a multiple-valued CCK text field with values like English, German, French, etc., it will be exported to CSV as EnglishGermanFrench. Would it be possible to add a delimiter like with taxonomy fields? Configurable delimiter would be nice, but just comma-separated is good as well.
Thanks for these excellent features.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.