What compounds do Nor1 and Nor2 citalopram refer to?
Those names are referring to desmethylcitalopram and didesmethylcitalopram, which, as you correctly predicted, are the N-demethylated and N-didemethylated metabolites of citalopram. Per IUPAC conventions, the nor- prefix is used to refer to any structural derivative of some parent compound in which a single carbon and (possibly) its hydrogens have been replaced (typically by a hydrogen, but not exclusively). See the relevant Wikipedia page on the prefix for more detail.