Should it have bothered Kellen that at one point his cock wasn't getting hard but he was still able to cum? No, because he'd had a conversation with Rhys about it before and it was something that Rhys had been excited for Kellen to learn.
Kellen was actually impressed that he was able to keep up with Rhys better than he had been able to before. If that wasn't a sign that Kellen had jumped Classes, Kellen wasn't sure what was, because there was no way that they had been able to put in the practise and repetition work that Kellen would have seen the results from otherwise.
