I changed the words but the app still asks for the old one

Dear Memrise users,
I created a course on my own, and I misstyped a few words. I realized it and corrected it, but even thought I logged out, re-installed the app and logged in, the program still offers the wrong words. What should I do in order to refresh the database on mobile phone? (I tried it on iOS)

Thank you in advance for your answer.