It can be that issue causing your payment delayed. Have you tried to contact them directly and asking why this is happening?
Move to other pool seems the best choice for now at least until there is clarity from current pool.
Well they paid me 309 Musicoin in 15.28 pm and another 43 in 20.28 pm. It seems they are making irregular payouts but they are paying. Nomnom is being marked as the best pool so far for mining Musicoin so I am continuing with them. Probably it was because of easter holidays so I am keeping an eye on next payouts, they are paying me sometime even lower than 50 Musicoin which is the minimum.