Rasp bed

I gave the raspberry bed a good weeding and to sort the raspberries out, I bought 4 plants beginning of the year and planted them. Each plant had 5 twigs in each pot, so I planted them as I got them. But a few people have said I should of separated each one and planted them,but I never took any notice until yesterday when I finally did something about it.

I dug them all up and soaked them do I didn't damage any roots,once soaked i replanted them all down both sides of the bed. I did notice that 4 of the twigs have gone missing or 4 plants,don't known of the birds have took them or just vanished.