At first I was trying to set up "recurring or one time donations" in a single form. There was a field for it, and the administrator said I could set up multiple feeds with conditional logic on the feed pointing to that field on the form. That didn't work because once the form has been connected to a feed it cannot be used again to connect to another feed.
So, to resolve it, I created a 2nd form (the first one being recurring, the 2nd form being one-time), and linked each of them to separate feeds.
Then, I needed to link the recurring form to different frequencies (monthly, quarterly, yearly), so I came to the forum and found someone who asked how to do that and the same administrator said "set up multiple feeds linking to the same form, using the conditional logic on the feed matching that field on the form. Again, you can only have one feed per form. When I click "New Feed", you cannot select that form. Only forms that have not been linked to a feed.
So, unless I'm going about this all wrong, there is NO way to link multiple feeds to the same form.
Please advise.