I was told to put a ticket about these two for investigation purposes.
Rainforest Oak doesn't register for the cutting machine for oak wood planks, nor does it register for certain specific recipes, such as Wood Gas, Wood Vinegar, Creosote Oil, Wood Tar, and Charcoal Byproducts.

Rubber Wood has a duplicate Centrifuge recipe turning into 60 Methane. However, there already is a Centrifuge recipe involving the same amount of Methane, but with 4 different materials added in (the correct recipe).