Just like it says on the tin, if I type MVPRODUCTPROMPTSMULTI, I get MVPRODUCTPROMPTS, which is different and not what I typed in. This all seems to be despite the fact that MV clearly calls the prompt MVPRODUCTPROMPTSMULTI whenever you click the button in the Modify Products Menu.

Is this a glitch/fluke on MV's side or an error in my understanding?

Is anyone else able to recreate this themselves? I'm very curious about this.