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Both balls lie on either zide of a curved zero line which runs through the low anchor in the middle. Both putt are aimed/ hit straight at the hole showing how the first put misses to the left and how the second put misses to the right.

Remember that both putts are missed on either side of the zero line when aimed straight at the hole.

Incidentally, if you're on a straight planar surface, and you're directly below the hole, shoved putts will miss farther right and pulled putts farther left. So the same putt, depending on whether it's started slightly left or right, will break in both directions as well - and that's a non-curved zero line.