What I noticed about these Star Cinema releases is that if you check the trailer of the main feature that comes with their DVDs, it's usually in widescreen non-anamorphic 1.85:1 aspect ratio. Then the actual movie itself is 1.33:1.

If the trailers reflected what was shown in the theaters, then it look like the film (at least for Caregiver) was shot in 1.33:1 then matted to widescreen for theaters. So the DVD show more picture than what was shown at theaters, which aspect ratio reflect the director's original vision is not known...
Still, the other complains about picture quality (and lack of Pilipino subtitle) stands.