I've removed the block against targeting mobs with the same HP as NPCs because some mobs actually have this HP value. It was an easy way to distinguish them, but I will come up with something else. In the meantime, you can block entities from being targeted with line 19 in config.txt (if needed).
This change requires updating Speeder to version 13. You can find the latest version by clicking the MEGA Folder button in Launcher.