if you have the unkai kabuto +1/+2 you get an enhanced Seigan that will allow you to counter even if third eye is not up, so long as seigan is. Another answer is that you could be getting counter procs from atma of the gnarled horn. The Unkai Haidate +1/+2 also enhances hasso, i forget how off the top of my head, could be where your extra effects are coming from. Been a while since I really used my SAM or really even took a look at what the gear does.
90DRG 90DNC 90PLD 90COR 90RNG 90THF 90BST 81NIN
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I killed Asmodean, let the speculation end.