Use adhesive **starter strip **instead of the shingles. The adhesive stuff holds onto both flashing and rain/ice real tight. Lowes and Home Depot has it in various colors. I demonstrated it to a couple long time roofers who wondered if it was any good. IT IS.
Be sure to overlap favorable to the ‘usual’ wind direction when it rains. Usually that is from the West, but that can change with mountains, nearby buildings, or proximity to other wind-altering devices. (Your house isn’t under a wind-mill is it?)
That peak is the MOST IMPORTANT part of your roof. Protect it or water can get under the shingles and destroy the whole roof. It’s good you raised the alarm. This can be serious. If it hails on light guage flashing, it can turn it into crumpled tin-foil. Get some asphalt up there.