They Keep Using That Word "Priority"

I don't know how much of their chemical weapons materials Syria needs to be a threat, but at least nearly half of the chemicals are out of Syria. But what was the point of having "priority" categories of the material?

One, at least the pace of removing chemicals from Syria has picked up:

The OPCW said three consignments of both "Priority 1" chemicals and less hazardous "Priority 2" chemicals have been shipped from Latakia over the past week.

The 11 consignments represent 49.3% of all the chemicals that must be removed from Syria for destruction, including 34.8% of Priority 1 chemicals and 82.6% of Priority 2 chemicals.

I know that at some level I just don't grok nuance, but I don't think the word "priority" means what the OPCW thinks it means.

Shouldn't all of the priority 1 chemicals be removed by now with, oh, maybe just a quarter of the so-called "priority 2" chemicals removed?

I mean, if we've gone to the effort to prioritize their danger, why not remove the higher priority chemicals first? That was the plan, after all:

The removal of Priority 1 chemicals was initially due by 31 December, while the deadline for the shipment of Priority 2 material was 5 February.

We'll see if Assad can inflict a lethal blow against the rebels under cover of this agreement before he loses all of his chemicals.