Astral Construct attack, wrong bonus?

[Wolfix]

Is the to hit bonus wrong with the Astral Constructs? When I calculate them and compare them to what's actually listed there seems to be a mysterious -2 I can't account for. For example, from the srd:
(http://www.wizards.com/d20/files/v35/PsionicMonsters.rtf)
-I get the same thing for the other levels of astral constructs, btw-

2ND-LEVEL ASTRAL CONSTRUCT
Medium Construct
Hit Dice: 2d10+20 (31 hp)
Initiative: +2
Speed: 40 ft. (8 squares)
Armor Class: 18 (+2 Dex, +6 natural), touch 12, flat-footed 16
Base Attack/Grapple: +3/+4
Attack: Slam +4 melee (1d6+4)
Full Attack: Slam +4 melee (1d6+4)
Space/Reach: 5 ft./5 ft.
Special Attacks: —
Special Qualities: construct traits, darkvision 60 ft., low-light vision
Saves: Fort +0, Ref +2, Will +0
Abilities: Str 17, Dex 15, Con —, Int —, Wis 11, Cha 10
Skills: —
Feats: —
Environment: Any
Organization: Solitary
Challenge Rating: 1
Treasure: None
Alignment: Always neutral
Advancement: —
Level Adjustment: —

So bab +3 and str +3 and size +0 = +6 Slam total, and not +4 right? What am I missing?? I'm going nuts, I was at it last night and this morning as well... I just know that it's something really simple I'm overlooking and that I am going to violently kick myself later on when I discover what it is.

 

[StealthyMark]

2ND-LEVEL ASTRAL CONSTRUCT
Medium Construct
Hit Dice: 2d10+20 (31 hp)
Base Attack/Grapple: +3/+4
Attack: Slam +4 melee (1d6+4)

Actually, just the Base Attack is wrong. A 2-HD construct has a BAB of +1 (as a 2nd-level cleric). All other numbers are correct.

 

[green slime]

The Astral Construct you list has 2HD, and thus +1 BAB.

+1 BAB, +3 Str, = +4

WHy the entry lists Base Attack as +3 is anyone's guess.

 

[Wolfix]

Thanks for the quick replies... so it was a wrong print, sigh. I never knew a construct had a bab like cleric of same hitdie or lvl. Where can I find more info like that? I can't recall reading it anywhere...

 

[green slime]

Its in the MM.