Hi All, My roofing guy a few years ago placed the asphalt roofing over the flashing. I beleive its supposed to go under the flashing, no? I have a leak, there is a 1/4 step down between the siding and shingle, I have been smearing Henrys roof sealer in/on it, but it doesn't last very long, there is gonna come a day I can't get up on the roof. Is there a better fix for this?