I doubt they have left them alone because this tape is now 'out there'.
They don't have any choice but to df if they are following their own instructions. Firstly, the couple admitted to celebrating Xmas and they were not repentant. Secondly, even though they said they have not been talking to any other Bros and sisters, they have been talking to each other. The couple are clear about this when they say they are in agreement with each other.
It's amazing to see that the elders need more time to think about the situation, it's a clearcut decision but they have been so influenced by Dan and Anna that they can't see this. They are seeing ttatt without realising it.