Where?? /ten
ok look at the table itself, that in itself should self explanatory where it says 1st action, not first list of actions.

also, another clue would be reformed elemental wands that are currently in game. their levels are tiered according to which element.
the wind wand is level 24? the next one up is level 30 something (this is off the top of my head from when i looked at the market wards.) this coincides perfectly with aero generally going to be a weaker spell than all of the others because your going to learn that first.

oh yeah and there is this.
one action or trait learned for every two levels gained
thats a direct quote from the letter. again having more than one spell learned at level 1 would not be
one action or trait learned for every two levels gained