They do not, you are either missing the 2 guards that patrol up the steps after the first boss, or you are not grabbing enough trash deep into the hallway at Ruul.
The ‘route’ for WCM is just a rough template. You’re going to get lust on CD ASAP from Triad, and pull whatever trash you need to have lust for Golliath. If you’re pulling from the hallway to the court yard (which I recommend), as long as the room for Ruul is cleaned you can simply double check the hallways and clear that trash in Ruuls room before killing the maggots/witch and heading downstairs.
Missing < 5% trash in WCM isn’t a big deal, it’s more important to route lust timers. If you have to go back to the start and grab 2-3 mobs and burst them down after Guruk Tul it’s not the end of the world thankfully.