Hi Jocelyn S. - thanks for reaching out and sorry for the confusing document! We are in the process of updating our help docs for spreadsheet support, which will provide more up to date guidance.
In the mean time, if you want to import a spreadsheet into Dovetail, you can just go ahead and drag it into your project or click import - exactly how you would do with a video or PDF. You will then be presented with a CSV mapper, that will allow you to format your spreadsheet data as you like (i.e. choose which columns to include/exclude, select which column (if any!) you'd like to be the title, choose data type (from text, multi select, single select) where applicable).
Once you've imported your data, you can choose to view it as a table from your view settings.
Let me know if anything doesn't make sense, and apologies again for not having clearer directions available!
