Difference between timelines & dimensions

Hi EA,

I do have a question which a trusted medium ( she is channeling the souls of humans) brought up. She said that is very important as a medium to always ask for the right dimension a soul does exist in. As in her experience a medium can involuntarily fall into a different dimension of a soul and hence sometime will give a „wrong“ answer (E.g. „Is xy ready to start this new job now?“)

My first thought was that she was referring to the different timelines which a person chooses by their free will and hence there are different paths.  But she denied and said that these are two different things but for her it is far too complicated to explain and she is missing words to describe it. 

I always thought dimensions are 3D,4D,5D….but there is more to it?

Would LOVE to get your perspective on it! 

Much love,

Julia