actually you have to see if that hashrate you are on your pc is the same on the pool, the hashrate you are mining is not always the same as the pool you are mining to, if a card does 29mhs on your pc maybe is doing 20mhs on the pool, check for invalid shares, stale shares, also check if there are no issues, mining probably is staying off sometimes, not mining 24/7, also you need to understand that while whattomine shows is a constant price profit ratio, sometimes the pool earns less and on the next day earns more, what you have to do is, check it everyday for a week and decide. If you are not happy you can always change the pool.