About Onigashima CE

This is a little late to be asking now, but I didn't think anything of it until two days ago. During Onigashima, I cleared out all CEs from the exchange store and most items (leaving mainly a few class pieces) and also cleared all of the point rewards from raids. How come I got six of the Hot Spring CEs, but only four of the Divine Princess of the Storm ones? I saw someone two days ago who had a full limit broken DPS and I was wondering how they got the fifth, because I didn't see a fifth anywhere in the event. But also, why six of the Hot Spring ones?