I am very confused about the birds nest spruce

[Carapace]

So, I got a a birds nest spruce from a nursery last winter, I wired it and pruned it and left it in the pot for the growing season, I was expecting 1 growth flush as it technically is a cultivar of norway spruce.
Well, to my surprise it grew new shoots on 4 different occasions, I even pruned it again because it became very bushy, is this normal?
I mean, four times.......damn.

 

[penumbra]

Technically, spruce are classified as single flush, but I find they often have multiple flush when heavily pruned.