Meanings of seem unnatural in English

Does this commixture of elements make the Play seem unnatural or incongruous?

Apparently it did not seem unnatural to the man beside her.

It did not seem unnatural to him; he did so.

But there were no quarreling voices inside the uproar, which made it seem unnatural.

I don't think it would seem unnatural to any one.

Yet I scarce realise the fact of being a Bishop, though again it does not seem unnatural.

They seem unnatural and inappropriate for a sacred city, but are not more incongruous than other features.

They don't seem unnatural.

That this long story should be told in the dozen words with which she greeted Richard, will seem unnatural to the disinterested reader.

The northern temperament is not impressed with these long tirades, full of ejaculations and apostrophes; they are apt to seem unnatural, insincere, and theatrical.

The comparatively bright outline of the door helped Mat make a beeline for it, if not quickly, then not slow enough to seem unnatural, either.

Nota bene, what has always seemed unnatural in an aria are the asides.

The trees stood stark against the sky, in a green that seemed unnatural.

It seems unnatural, because they are the hottest of the day.

It seemed unnatural; she was shocked at herself, but he attracted her irresistibly.

Being apart from Helios, even for a few days, seemed unnatural.