Yep, that’s how it goes a lot of times 
But I do know some who have kept to the 1 project at a time 
My WIP pile is out of control and has even branched into a UFO pile 
But my current actual WIPs include a sweater for my son, a sweater for me (both are “scrappy”), a temp blanket for my son, prototypes for one of my pattern updates, and a baby blanket for an almost 2 yrs old
Also, I encourage you to check out Make It Monday, WIP Wednesday share, and Finish(ed) It Fridays! (the last name came about when I was streaming and trying to get some of my UFOs finished… I wasn’t “allowed” to start a new project and would often work on one of the abandoned ones)