Castsequence - why is it acting like this?

[Owltoid]

Here is what I would like to accomplish:

Moonkin1)
Assist tank
Cast moonfire
Cast starfire once
Heal tank
Cast starfire twice

Moonkin2)
Assist tank
Cast moonfire
Cast starfire twice
Heal tank
cast starfire once

I thought the following macros would work:

Moonkin1)
/assist Tank
/castsequence reset=combat Moonfire, Starfire, , Starfire, Starfire
/cast [target=Tank] Nourish

Moonkin2)
/assist Tank
/castsequence reset=combat Moonfire, Starfire, Starfire, , Starfire
/cast [target=Tank] Nourish


However, what seems to happen is everything goes normally until the first nourish. From then on every toon just alternates casting one starfire and then one nourish. It continues to do that, never even getting back to the moonfire and it never casts multiple starfires in a row... always one starfire, one nourish. What am I doing wrong or is this type of system not possible? In truth what I want to do is have all four druids casting HoTs at different times as they go through their castsequence, but I tried to make the example easier to get an answer about the castsequence mechanics.

Thanks!