Hello everyone, I've been having an issue trying to understand the correct way to set some multi-word terms in my analysis. Please take a look at the following printscreen:

This is the SAS Table for Multi-word terms + some terms I have inserted myself. I have a few questions about it:
1) Where do these # Documents come from? I don't have any of these terms in my analysis;
2) Why the last ones (starting from Rio de Janeiro) are all 0 (which happens to be the ones I inserted myself)?;
3) And last question: Which is best for setting multi-word terms: setting a multi-word term or adding to the synonyms list? I ask this because for instance I have many documents containing "Rio de Janeiro" but on each document it's written starting with a variation in the case of the first letter, for example: "Rio de janeiro", "rio de Janeiro", "rio de janeiro", "Rio de Janeiro"...and the counting for the multi-word is not aggregating all documents with all variations. I don't know how to overcome this scenario.
Thank you very much in advance!!