@ Brad
Is should like you are using the All export tool, is that correct?
But then it sounds like you are trying to import the result of that tool using the Category import tool.
If that is the case, this will not work (well, you could import just the categories). You need the CSV Import extension. Here’ the docs outlining the requirements and tips when importing a CSV file using the CSV Import extension. The file exported using the Export CSV All tool meets the already meets requirements. So there is not much to worry about there. Just make sure you read [this FAQ] if you are importing to a new site.
If you are migrating an entire site, the proper way to migrate is to use a plugin like BackupBuddy or DUplicator. They take the pain out of migrating entire sites.
Hope this answers your question.
