Nepali citizens holding Nepali passports do not require visa to visit India or even to work, stay there. I guess the consulate there doesn't know about this requirements. I was in India a month ago stayed there for two days. and everything was OK. Well I don't know if they have changed the rules lately which I highly doubt. If the rules were changed, I am sure we would have heard something about it from Nepali media or in sajha itself.