User blog comment:ChishioKunrin/The manga's coverage of the White Trailer/@comment-26882656-20170625150304/@comment-73.61.188.130-20170626151450

The way I understood that was that Weiss fought the 'original' earlier in her training (might've been a robot), eg after she decided to be a Huntress but before she'd settled on which Academy she wanted to attend, and the 3x more powerful one (Geist-possessed) was the one seen in the White Trailer and manga, and was the one that if she beat it she'd be allowed to go to Beacon. The ones in front of the staircase are likely just decorative but served as inspiration for the ones used against Weiss. Feels to me like Occam would agree with me on this one.

-He who is AWESOME