Doubles

I was reading about the German writer Goethe and the Hungarian teacher Emelie Sagee and their 'double' experiences.

Whilst Goethe saw his future self on one occasion, Sagee on the other hand was able to be in two places at the same time purely from intent. It lost her quite a few jobs.

I was wondering if anyone has had a similar experiences or know of any? Theories would be great too.

I myself have had one experience which I think could be linked to this but I don't want to try and clarify it.

Could these experiences be put down to 'loops' in time? Or simply our own ability to predict? Or in Sagee's case, purely because we wish to be doubled?