Russell gets the day correct; He remembers that he was late taking E**a to Minis, it was 9:50 when she was signed in. After that, he says, he went back to his apartment and E**e slept. After she woke he took her to watch Jane play tennis. There wasn't much time for a sleep so that might have been misremembered.
However, Russell has Kate, Jane, himself and Rachael watching the Mini tennis, which began at 10:30 until 11:00. He recalls the father with the video, which, it seems, was analysed by the UK police later.
According to Jane she, Russell and E**e then walked down to the beach, meeting the Paynes who were on their way back up after sailing. They told her they'd seen MM and E**a sailing. Russ took to the water in a kayak and Jane sat on the beach with E**e. She also saw the Minis getting ready to walk back up at 11:00. They returned in time to pick up E**a and had lunch in their apartment with the Oldfields.