RTP is a theoretical long-run ratio of returned amounts to total stakes. Turnover includes money wagered again, so it can exceed the initial deposit. Volatility describes how uneven outcomes can be; a return percentage alone cannot supply a distribution or predict the next spin.
At an assumed RTP of 96%, turnover of 1,000 has an expected return of 960 and expected loss of 40. A short session can be far above or below this average. Check the exact installed game configuration. A provider’s published percentage is not proof that every operator uses that version.