L.Elemental Options

[drag10]

okay, right now, i'm in ch 7 of riviera and i've hit a dead spot. i know that elemetal emblems (fire emblem, etc) can be obtained in practice mode by fighting the purula air force (1 siren, 2 L.Elementals) and beating the elementals after they've changed to the respective element. thing is, i only have the holy emblem left to obtain and for some reason, no matter how long i prolong the battle, the elementals always change to every other element except holy. i can play the battle for up to an hour or so and i still can't get the holy emblem...just wanna know, is this a bug in the game or am i just extremely unlucky? anyone else encountered this problem too? (i could just ignore this and finish the game but force of habit makes me wanna get as many items as i can in this playthrough >_>)