I went to a very good talk at the Royal Welsh this year. They said that there is 10 days 'life' in a piece of meat. You have to take into account the time the abattoir has had it and then you have the rest of the ten days to freeze it, eat it, etc. if you freeze within this time it is apparently quite safe to defrost and re freeze again providing you are still within the ten day limit.
I can see that you have decided to post over the weekend and I think it's the right thing to do otherwise you leave the customer with very little choice because by the time the meat gets to them it will probably already be about on its 10 day limit.