► My b22 bulbs are too long and cannot twist them to get them to seat?

You can remove the plastic light fitting screw sleeves and reduce their height by 2mm with a file.

They fit all my bayonet fittings in my home, but I have seen a couple of b22 lamp fittings where they hit the sleeve ridges of the light fitting.

Yes the b22 dual white, and the b22 rgbw are the same in this respect.