Manchester are second class citizens again

I flew MCO to MAN UC on 27 February. I was surprised to receive an old amenity kit, so asked on Facebook. The following is the reply received:
Hi again Jane,
I've checked as to why it's the older amenity kits are being handed out and it is simply that the most effective way to use them up. From a logistical point of view, we wouldn't have enough of the older kits to cover all of our Gatwick and Heathrow flights, so they are being used at Manchester for the time being. Please can you message us your address
Howard
Why aren't the kits used up across all routes until they are finished?
Jane
Hi again Jane,
I've checked as to why it's the older amenity kits are being handed out and it is simply that the most effective way to use them up. From a logistical point of view, we wouldn't have enough of the older kits to cover all of our Gatwick and Heathrow flights, so they are being used at Manchester for the time being. Please can you message us your address

Howard
Why aren't the kits used up across all routes until they are finished?
Jane