Turn on the collection feature deliberately
Sling’s Unlimited DVR page says Replays is included but must be enabled. Its documented route goes through DVR, Replays and the offer to activate it. Having the storage upgrade alone should not be treated as evidence that the automatic Replay collection has already started for the account.
Compare the type of item rather than the shared DVR tab
The page gives three days for games and sporting events, seven days for new television shows, and a different window for other movie and series Replay content. Suppose you return to a game five days after broadcast. Its absence from Sports Replays is not contradicted by a separate nine-month DVR retention statement. An automatic sports Replay and a recording you specifically scheduled are different ways of reaching a past event.
Do not assume activation recovers every earlier game
Sling says games airing after the feature is enabled begin appearing, and its sports list is conditional on the event airing on the account’s Sling channels. It specifically excludes events on SEC+ and AAC Network Extra from Replay, while noting possible on-demand availability. Before relying on Replays for a particular fixture, inspect the channel, collection and actual window. If the event is absent, search the relevant on-demand catalogue as a separate option. This explains the documented collection behaviour; no upgrade, opt-in or recording was performed here.