Ascension in spirituality for some people means to expand on one's awareness, this can be often seen as rising up out of an unaware state but that's not what is actually happening, especially when you consider we are always in an ascended state. How can you ascend (rise) from an already ascended state?
The reason we don't think we are ascended is because we are unaware of this, all what being ascended means is becoming aware of our ascended state, a state of oneness, it's all to do with an expansion of awareness, not the rising up of awareness.
Instead of explaining this awareness as an expansion, we explain it as an ascension, a rising up out of a state of ignorance. It's really not the right terminology to use in spirituality in my mind.