A weird traffic pattern: Turns on a multi lane road intersecion

I keep noticing this very often: There seems to be a weird traffic pattern in the Philippines, that when cars take a turn, that they basically skip one lane into the middle of the new street. It seems like sharp turns are unpopular somehow. But the consequence is, that the outermost vehicle will have to squeeze in with the rest of the traffic, while the innermost lane remains unused.
If anybody knows why that is, or whether this is even the official traffic law, let me know. I am curious.

More strange patterns are about to follow.