Need help in sub box sizing

[sniper]

that makes no sense either most 10s take a minium of like .5 cf i just cant see it being that small unless it a shallow mount or some bs

I am not sure what you are looking but if CW "recommended 1.59cuft ported then it only makes sense that sealed is going to be smaller. 1.59cuft, was that for a single sub or two?

Having said that, your not going for an all out SQ system, and those specs may or may not be right. But with only a sub that is rated at 250w, just build a box that is 1 cu ft internal. And run with it. Don't get all beat around with the specs, yes they are important to a certain extent, but with what you are doing, not so much.
Most of the online calculators are crap.
Keep in mind that if they are old subs, you need to check the surrounds for wear and tear.