You probably did some modifications to the source or DB that caused this because I doubt it's like this in default rAthena. At least the last time I tested Deluge and Land Protector it looked just fine.
What's your skill_unit_db?
285,0x9a, , 3, 0, -1,all, 0xA010 //SA_VOLCANO
286,0x9b, , 3, 0, -1,all, 0xA010 //SA_DELUGE
287,0x9c, , 3, 0, -1,all, 0xA010 //SA_VIOLENTGALE
288,0x9d, , 3:3:4:4:5,0, -1,all, 0xA010 //SA_LANDPROTECTOR