Likely confused rather than mistaken. The Telecommunications Act set up the various titles and regulatory regimes, but the FCC decides which regime applies to whom, and until 2002 (Cable) and 2005 (dial-up and DSL) ISPs were classified as Title II, which is where the FCC put them back in 2015.

And the reason the FCC moved them back to Title II is that in 2014 the courts ruled the FCC's long-standing Net Neutrality rules could not actually be enforced under Title I.