Are you sure? Were their undersides smooth or a bit rough, or were they honeycombed?

Honeycombed = polypore, anything else = Stereum. The photo resolution isn’t high enough to be sure but it’s probably Stereum given its appearance, and then the dark jelly nearby is probably Tremella.

Yes, there were bright orange polypores covering the log, with some clumps of the red, rubbery fungi interspersed between them.

Tremella foliacea. As I understand it, Tremella often are parasitic on Stereum and it looks like there’s some Stereum on this wood, perhaps S. complicatum.