"What's a 1-3 count?"
That's what the count looks like when I signal you if you read normally from Lf to Rt.
"This is not interference unless there was intent."
Batter-Runner interference does not have to be intentional. That is why my tittle says "technical." We no longer have a batter (one set of rules), we have a batter-runner (different set of rules.)
Common sense, logic, spirit of the rule suggests that B-R cannot instantantly disappear - BUT - the rule say you cannot interfere - intentional or not.
WMB