is this a problem with the specific course or a site bug ?
probably a result of randomizing
keep the picture: it might be a once in a lifetime experience
if you do not specify the course, how one should know?
otherwise, this old issue on memrise has a name meanwhile: the issue of deleted entries/ phantom entries in the database. Search in the fora, you might find one two things about…
the name of the course is visible in the picture
well, i have difficulties in deciphering that… anyhow, good luck learning