No, there are two daily Mon-Fri diagrams. I think its to do with GMPTE funding for the strengthened services
Yes a peak Hazel Grove-Preston and Manchester Victoria-Blackpool service in both the morning and evening is GMPTE funded Mon-Fri. The Hazel Grove 180 only does one Preston-Hazel Grove working that isn't sponsored by GMPTE. The Manchester Victoria-Blackpool 180 says in operation throughout the day Mon-Fri.