Because nofollow links verified decrease?

Hello guys!
I am carrying out 3 campaigns at the same time, generating a total of dofollow and follow links, see image:

As you can see, most of the links are nofollow, but I would like it to be the other way around.
So, what I did was edit each project selecting only dofollow links each one, so see the image.

After modifying the project I am observing that the number of nofollow links is slowly decreasing and the dofollow links are increasing.
Why should they get off? If they are supposedly already created and verified, you should only follow the course.