The Steiner's break up angle and subsequent feud is such a long ass angle. It has its roots in late 1997 when a more aggressive proto big poppa pump starts fucking up in various matches and it doesn't really end until...2001! It just takes little breaks.
The first part of the angle started in late 1997 and went straight through to early 1999 when Rick got injured. He came back a month or two later as face for about a month and then turned heel. They formed more of an alliance than a tag team for a while. Scott got injured again and Rick reformed the Varsity Club for a month or so. Scott came back with the NWO 2000, while Rick was injured again I think. Then the reboot happened and Scott kind of went face, teaming with Goldberg against Rick/Tank, only for it all to be a SWERVE. Then Goldberg turned heel a month or so later and turned back a month or so after that. Then Tank joined 3 Count. Rick took time off (probably due to an injury) and came back as a face, saving Nash from a Scott beat down. About 3 weeks later, he turned heel again and the Steiners stayed together for the last month and a half of WCW.