Alimony Question Please help any legal advice?

Ok i know the smart guys are going to be say go see a lawyer or why are u getting advice on yahoo..i just have a question hopefully someone out there can answer the question. If someone is paying alimony 2 month once on the 1st and again on the 15th. What happens if the person paying gets paid 3 times in one month? For example they get paid today the 30th which would be the third paycheck for July. Would that person still have to pay alimony? and would it be for the first of august? Please help!