Midjourney creations – more mechs

Not satisfied with yesterday’s Timber wolfs, I tried again from scratch.

Arguably all are even further from a Timber Wolf. Now what’s really odd is what happens when I add “conical cockpit” to the prompt – started new, not a variation. Why did it create completely different mechs, in a completely different style? Why do two of them have 3 legs? I’m so confused.