Is dual aspect (a player that has a single classpect and aspect but gains an additional aspect later on, most likely the opposite of their current aspect ie. space<~>time) possible and if so would it result in the player becoming glitched out as it is something that normally does not happen in a session?

Players tend to stick to a single Aspect at a time, however they’ve been shown to be able to adopt other Aspects other than their own through outside forces- Corruption in the case of the Horrorterrors, but definitely possibly, if perhaps unhealthy for them.