There‘s actually nothing wrong with being both in cadets and the reserves, I‘ve known a few people who were actively in both (one guy on my BMQ insisted he should be addressed as Cadet Warrant Officer because he still bore that rank in cadets). If you do chose to remain in both, just remember that as a reservist you are subject to the Code of Service Discipline any time you are on DND property or at an event sponsored by DND (i.e. just about any sort of cadet activity) so even though you may be on cadet time, you won‘t be able to get away with stuff you usually could. A buddy of mine who had been sworn in thought that because he was leaving cadets he could start telling people off, but when one person complained, the corps UHRO initiated a harrassment charge against him.