Is it possible to have the same resistance multiple times / from multiple sources?

[Potest_Nucis]

Before the recent errata to resistance mechanics the question wasn’t relevant. But since each resistance is only applicable once, can you have multiple sources of, say, resistance to all damage, to protect yourself against multiple sources of damage? For example, can two champions use their reactions to protect party member from a flaming sword strike, where both champions give the same amount of resistance to all damage, but one is used against slashing damage and another against fire damage?

Another question is about the rule of “if several resistances are applicable to a single type of damage, apply the highest one”. If I have two resistances applicable to one of the types of damage but the higher of the two has already been used up for different damage type, can I even use smaller one?

[Easl]

I would rule the subject/victim PC gets to choose how to apply the two champion effects, so both could be used as long as they are used on different damage types.

Why rule that way? Well I think it's the most reasonably consistent way to apply the first and last bits of this part:

A single effect can activate more than one resistance at a time, but subtracts each of the subject’s resistances only once. If the subject has more than one resistance to the same damage type, they apply only one, usually the highest. For a resistance to a category including multiple damage types, like resistance to physical damage, to spells, or to all damage, if the subject is taking damage of multiple types included in the category, the subject can choose which damage type to use the resistance against.

[Claxon]

I don't know that the errata on how resistance/weakness works is settled yet.

As I understand the situation, Paizo released a statement that would errata the function, but there was a lot of blowback and players being disappointed and providing examples where the ruling really broke down and didn't make sense.

I say all that to say, I don't think there's been anything else official since that. With Paizo likely still reviewing how to handle it.

However, I might have missed an additional official release of errata. Hopefully someone else better attuned to this topic can chime in.