I just made a bear test. its a level 15 shadar kai 1/6/8 rogue/monk/druid.

I first tried with 2 natural fighting feats and it only gave me glancing blows on two of the four attacks on the training dummy. I thought that perhaps 3 natural fighting would give the third glancing blow but it does not. It is on the first and third hit in the attack chain that they occur.

Anybody else noticed this?