Nope. the pool can have high rejects compared to other pools.. But this pool stats can sometime also be off.

over the past week i went back to a different pool with less stats and lower mh/s / btc  and even with the lower published stats of mh/s to btc on that pool versus the higher rate on this pool, i made more on the other pool..

Try another pool after a few days and see what the difference is.