Citi Sponsorship

So something weird going on with Citi recruitment that I would like insight on. So Citi just gave me an offer for their GCB summer analyst position and I signed the contract and sent it over. Over the course of recruitment even in their pre-employment surveys, I have mentioned that I am an international student. The contract however says that they don't sponsor international students. Now the weird thing is that I know quite a few international students who got an offer from Citi for the same position and their job posting doesn't say anything about not sponsoring as well (which they explicitly clarify for other positions). Not sure what to make of this. Am I going to lose this internship?