Nice work. This guy has a bigger list https://nbahoopsonline.com/History/Records/5worstyears.html
For all the talk about Philly, they are only 7th now 8th on that list. The 34 win season they were not yet trying to lose since Collins was still the coach. Then the year after winning 28 games, they won 52.
That Memphis run could probably be expanded to 8 years. 01 and 02 they only won 23 games. 03 they won 28 and finally in 04 they won 50. But 3 years later they started another bad run only winning 22, 22, and 24 games.