Choose the edition before the episode
Love Island USA, Love Island UK and Love Island Games have separate title pages. A matching season number does not mean a matching cast. The US season seven search belongs with the US series, while the British programme follows its own season history.
Open the three-title collection and compare the displayed edition. Then look at its seasons. Changing the viewing country affects the outgoing offer search, not which programme you selected.
Keep returning to the right place
On the show page, set the season and last completed episode. The reminder stays in this browser. Reunions and extra programmes can be organised differently by a viewing service, so compare names and dates when the numbering does not line up.
If you watch both main editions, save each separately. Two clear checkpoints are more useful than a note with an episode number and no indication of which cast you were following.