I might've missed the official rule somewhere, and I get the feeling what we're doing is correct but wanted to check just in case.

When the Mythos targets the "Investigator with the lowest x" and you both have the same, we just choose. In most cases we'll say "well the last Mythos targeted you so I'll take this one".

Just wanted to make sure there wasn't something official I missed.

I'd say that it is covered in the RRG, on page 2:

During the game, some game effects may lead to conflicts within the

game or between the investigators.

^

It is possible for a game effect to have more than one possible

outcome. In such a case, investigators as a group determine the

outcome of that effect.

I'd say that it is covered in the RRG, on page 2:

During the game, some game effects may lead to conflicts within the

game or between the investigators.

^

It is possible for a game effect to have more than one possible

outcome. In such a case, investigators as a group determine the

outcome of that effect.

And

It is possible that investigators ha ve differing intentions and goals.

If this prevents investigators from reaching a decision as a group,

the decision is determined by an investigator chosen at random

Yeah, see totally missed that. Glad I asked thanking you!