That are genuinely seeking entry as a visitor for limited period as stated
- That they do not intend to leave the UK at the end of the period of the visit
- That they do not intend to take employment in the UK
Thats such a silly decision. My interpretation of that is that they thought your family would stay with you, rather than going home.
I guess the evidence for going back means you would to be financially better off and have a nice job to go back to.