I don't see anything suspicious here. As far as I know, there's nothing wrong with 3 buds on one stem, especially on a floribunda; but I am not exactly the most "experty" expert out there, per my name. Hopefully others will chime in.

It's possibly Rose Rosette Disease in its early stages, but most likely Rose Spring Fever. Rose Spring Fever is a term I use to describe unusual growth, mostly appearing in spring, which clears up soon enough, and is of little concern. However, if it is RRD starting to show its symptoms, eventually it will kill the bush, but most rosaries take measures long before that, and destroy the bush. Right now, just wait and see what comes next.

Moses

It looks completely normal to me. Some varieties of roses simply produce multiple buds per stem (some more regularly than others).

Completely normal new growth.

It is fine. Many rose species bloom in clusters. Look up the specific species of rose you have and see if it is normal for that species to bloom in clusters.