The reason I mentioned temp and air together was, I suspect the two part mix gets a lot of air mixed in in the mix process. If the temp was too low, the heavier viscosity might have inhibited normal bleed off.

If the type of two part mix you are using is as easy to mix as mine was (50-50), it might be worth cooling enough to make a spoonful to apply to a non-pourous surface (I always used clear visquine under my pours) to view the effects of a mix done well below recommended temps.