Ben, Frank, and Sun are on the Hydra beach where Ben uncovers three (3) hidden outriggers. Although Sun asks Frank to come along to the main island, Frank responds that as captain of Ajar 316 he has a duty to his passengers. Ben tells Frank “There’s a small dock about a ½ mile due south, directly across the water. It leads directly to a town where I used to live. There are resources there…” Ben is knocked unconscious by Sun with an oar. It is daylight.
Locke and Ben uncover one of two remaining outriggers at Hydra. After Ben kills Ceaser they travel to the main island via the outrigger (Daylight). They arrive at the submarine dock and moor directly in front of the outrigger Sun and Frank had previously used. Locke and Ben arrive at the dock in daylight and reach the barracks at nightime.
The reason we think that Kate would point (she did point in a particular direction) and make her comment is in the context of her and Sawyers trip. We have to take their part of the whole episode in context. We have to realize that Kate just followed Sawyer from his barrack to the dock. It is likely that Kate was directing her attention the barracks they had left when she pointed and made her remark “That was your house, right, with Juliet?” rather than pointing at Sawyer's specific barrack and asking the question. There is dense jungle between the dock and the barracks, so it would be impossible for Kate to point at a specific barrack, but rather in the general direction of the barracks.
Even if the barracks were adjacent to the docks, if would have been impossible for Kate to point to a specific barrack due to the dense jungle surrounding the dock. Viewers have seen plenty of footage of the dock. Not once has their been a scene of the dock which even suggested a view of the barracks. It seems unlikely that Kate could have been pointing to Sawyer's barrack.