Raid,
The most recent IR image you posted shows how not using an IR filter for any color work is a bad idea. It's not just high IR reflectors such as synthetic fabrics, foliage, or seeing blood flow just below the skin... all the photo counts are contaminated to some degree by IR energy photons.
No amount of post processing manipulation can estimate the real, but unknown, IR content of each sensor site. This is precisely why Leica issued free IR filters rather than free software shortly after the M8 was released.
As mentioned above, the good news is B&W images often benefit from the same issues that make color work problematic.