Tides

Something really weird is going on. The tides have been very unusually high recently on the western end of the Indian Ocean – that includes the western and southwestern edges of Indonesia (the south coasts of Bali and Java) and includes the areas hit by the tsunami, the west coast of Sumatra, the Andaman Islands (owned by India) and the west coast of Thailand. In some areas in Java, people’s houses which had never flooded before were flooded 3 feet deep. They say it's in part because of the moon and maybe the SW monsoons, and maybe low pressure area. But they also say it's never been that high before. But why isn't the north side of Bali or the east side of Sumatra also having high tides???? Isn't the tide basically water sloshing back and forth? How come it's high only in certain areas???? The moon is full everywhere....