why the pool show Methuselah (lyra2v2) when have to be seci
You mean in found blocks? That would be due to that coin having all the hash power on the pool currently (no-one was mining Seci), if anyone had been mining this coin and blocks had been found they would have been showing in the list as well.
Anyway, at the moment it isn't known if this coin is working properly with YiiMP pools and I don't have the has rate on the pool to check so have disabled it for now.