Complex sentence: It reached No.1 on the "Billboard" Mainstream Rock Tracks on September, 13 of the same year, and also peaked at No.26 on the "Billboard" Hot 100 in November 1986.
Split into simpler sentences: It reached No.1 on the "Billboard" Mainstream Rock Tracks on September, 13 of the same year. It also peaked at No.26 on the "Billboard" Hot 100 in November 1986.