Hmm, I think I see what you're saying, but in my opinion the way that one bifurcates the timeline is by traveling back and forth in time, which is already count

Hmm, I think I see what you're saying, but in my opinion the way that one bifurcates the timeline is by traveling back and forth in time, which is already counted, and moving back and forth among bifurcated dimensions is already counted as well, so there's not extra dimension there. For instance, if you have a stick you can push back and forth in a groove and count that as one dimension, if you push hard enough against an obstacle the stick might break and rotate out into the plane, but that's still only two degrees of freedom.