Is the path of enlightenment consists 7 levels?
I want to point out the following:


TM and Buddhist path are not the same. TM aim at method for relaxation, stress reduction, and self-development while Buddhism aims at eliminating the Defilement and one's attachment to the 5 aggregates hence reduce the process of fabrication thus experiencing Nirvana.
The 7 factors of enlightenment are not linear. An interesting article which shows their interaction is in Bojjhangas– Another View. Also look at the table balancing the factors in the Wikipedia entry on Seven Factors of Enlightenment which gives when to emphasize each of the factors.