Morale based on relations do not stack?

[LtJoker]

I haven't confirmed this myself, but I've seen people say that morale from friendships does not stack?

Fox likes Wolf, so she gets +1, but if you also hire Steroid, that doesn't cancel out for +0, but instead the game checks for a hated merc and stops there, so she ends up at -1 morale? Shouldn't these stack? So if she has two she likes and one she dislikes she gets +2 -1 = +1?

I can understand maybe not checking for a second like since +2 might be overpowered and might make mercs that like a lot of other ones a bit too strong, but it should still be possible to cancel a negative with a positive?