Bev offers Totino's Pizza Rolls to the boys but in the 1980's they were called Jeno's Pizza Rolls. They were re-branded Totino's in 1993.
Johnny asks Adam if he wants to watch a bootleg copy of Highlander II. Highlander II: The Quickening (1991) wasn't released until late 1991.
Erica mentions Steve Urkel and his "Did I do that?" catchphrase. While the character did appear in five episodes of Family Matters (1989) that aired in 1989 - thus fitting in with "1980-something" - he did not become a notable star of the show until the 1990s.
Adam plays with the Transformers/Ghostbusters Ecto-1 Ectotron toy, which would not be released until July 31, 2019 - a full 30 years after "1980-something".