Eidolon With Slam Attack and Haste
 

My Summoner's eidolon has a single Slam attack in order to get the big strength bonus.

When I apply Haste as an adjustment to it, HeroLab doesn't show two attacks for the Slam.

Everything I read online seems to imply that Natural Attacks get hasted too, but I trust HeroLab to know the rules better than me. Is there some reason that eidolon Primary Attacks don't show up as hasted?

Probably because with natural attacks there are typically multiple options to choose from and it doesnt know which of your primary attacks you want to choose for your haste attack.

I don't believe haste gives you extra attacks with natural attacks.
You get an extra weapon attack, when you take a full attack action with weapons.

It does get you a +1 haste bonus to attacks, with all your attacks.
It gets the increase in speed.
It gets a dodge bonus to AC.

HASTE: When making a full attack action, a hasted creature may make one extra attack with one natural or manufactured weapon. (p294, Core)
It should apply, but I'm with Minous - HL probably doesn't know what to add it to.

It looks like Haste, as it appears in HL only mentions weapon attacks. While Haste in the SRD mentions weapons or natural attacks.

It's different in different places too: the description in your list of spells/spellbook is the updated text, while the Spell Adjustment tooltip shows the older text.

Thank you, all! I appreciate you taking the time to think about this issue.

It does seem like Minious has it correct. The eidolon's natural "unarmed attack" shows the potential to be hasted, but the slam attack doesn't. Since many eidolon's have mulitiple attack types, HeroLab would have needed to add a pull down menu to Haste. It is probably in a "to-do" list waaaay down near the bottom.

My party relies on our claymation buddy to slam things. Not being hasted would have been painful, but I didn't want to cheat.