Fickle winds on small creature

[Trisagon]

Can I cast fickle winds on my small-sized ranger?
The text seems to hint at a no, but it seems quite weird to me.

Targets one or more Medium creatures/level, no two of which can be more than 30 ft. apart
Duration 1 minute/level (D)
Saving Throw none (see text); Spell Resistance yes
Description
You create a mobile cylinder of wind encompassing every target of the spell and protecting them as wind wall, but not interfering with them in any way. For example, arrows and bolts fired at the targets are deflected upward and miss, but the targets’ own arrows or bolts pass through the wall as if it were not there.

A Large creature counts as 4 Medium creatures for the purpose of how many targets you can effect with the spell; a Huge creature counts as 8, a Gargantuan creature as 16, and a Colossal creature as 32. This spell has no effect within the area of a higher-level wind or weather spell.

[AwesomenessDog]

A medium creature counts as two small creatures, generally speaking but the fact it scales different upwards and doesn't give a scaling downward is to me meant to imply there's no cost reduction for creatures smaller than medium. I.e. If you're level 20 you can affect 5 large creatures, 20 medium creatures, 20 small creatures, etc. or any combo thereof.

[Pizza Lord]

Similar to AwesomenessDog, without a downscale example in the spell, we can't assume any discount for smaller targets. I personally believe that the spell is intended to affect smaller than Medium creatures equally.

This being the Rules Forum, however:

The wording would strictly be read that it only affects Medium targets. The target line states this, then the actually spell description alters this by stating how it can affect larger creatures.

In order, rules-wise, for this to work on any creature of a size not mentioned would be for either the target line to read,
'Targets one or more Medium or smaller creatures/level, no two of which can be more than 30 ft. apart',
which I think would be the easiest, or for somewhere in the description to state,
'Targets smaller than Medium size count as one Medium creature for purposes of targets you can effect.'
or something similar.

Again, that's just because this is the Rules Forum. I don't think your GM will find any problems arising from allowing the spell to work on a small creature. I can't really think of any exploits or game breaking issues (that wouldn't come up for any size creature using it).