My Husband's Paystubs Say Zero For The Hourly Rate And Time Worked Is This Legal?

My husband works for a small company who employs around 100 people or so. Every time we look at his he paystub the Hours and Payrate all say 0.00. Is this legal?

He has worked for this company for 2.5 years and it's always been like this. He asked why and they never really gave an answer.

Here is where it gets kind of confusing. He is supposed to be hourly as he never signed anything to be salary but on his paystub it says salary. Every check is 80 hours- for 2 weeks of work even if he gets to leave early when the work is done. Which is nice but then the company has asked him to work on one of his days off which he would do for overtime but they don't pay him anything because "you got to leave early on so and so day" when that is what they told everyone the could do when the job is done. Also this stuff happens to all of the employees who work directly in the warehouse not sure about drivers or office people.