Containers created by docker101tutorial

Hi,

I just installed Docker Desktop for Mac and I did the docker101tutorial proposed by the app.
I ended up with a list of containers that I found a bit odd.
I was expecting to have 1 image docker101tutorial and 1 container, but docker dashboard is showing the following containers as well:

brave_yonath / docker101tutorial
serene_dewdney / docker101tutorial
pedantic_albattani / docker101tutorial

Has anyone had the same behaviour ?
Thanks in advance,