Most times the composite tags like /, which are autogenerated by 'Add Tags' command are incorrect and so causing lot of manual work to achieve a proper tags tree. Would it be possible to avoid such tags from auto generation? Because it would be much easier to create such high level tags manually and move all or tags as children to such high level tags.
If your document is complex, you may get better results (and less overall time spent) by manual tagging from scratch as opposed to performing "cleanup" on auto-generated tags. Manual tagging may be accomplished via either the Touch Up Reading Order Tool or by selecting content and tagging within the tags panel itself.
Duff Johnson
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