Whenever two different roof pitches transition a specially designed flashing is needed to bridge the slope change. This roof does not have the correct flashing and is relying on sealant to disallow seepage. Over time the sealant will deteriorate and allow leaks. The pitch transition on your roof does not have any flashing in it. Eventually the roofing materials and mastic used to seal this area will cause interior damages.
Straight Line is 1 of 5 contractors in California that is certified by all 3 major roofing manufacturers