In The Progress of Insight by the Venerable Mahasi Sayadaw, in the section The Attainment of Fruition, it is said that:
This occurs in precisely the same way as the path and fruition consciousness that occurred earlier in the consciousness-sequence belonging to the initial attainment of the first path. The only difference here is the capacity of the fruition attainment to last long.
Whereas, in A Manual of Abhidhamma by Narada Maha Thera it is said that:
Each of the four Supramundane Paths arises only once in the course of one’s life.
Is Mahasi Sayadaw taking a differing position than what is said in the Abhidhamma or am I not understanding him correctly?