That is good - imagine if you disappeared and another you showed up and you made him start from scratch. My other selves would be very displeased.

I am questioning him. How people respond when you question them is often very enlightening. So far, I do not think he wants to be the sole arbiter of information. I think he has control issues. If there are Summoned who are working for their factions against their fellow Summoned, it's likely wise to have multiple types of backups as well as not have everybody know of them all. That would make it less likely that all information would disappear.

How do they intersect? I am not familiar - it intuitively makes sense to me that there is some relation: there have been certain arguments that state warp magic is more akin to skipping time than moving objects. Claude said your knowledge is more advanced than Fodlan's.