Hovering over the link Haunting Vision will show a tooltip of both sides of the card side by side, as is normal. But specifically calling up Akroma, Exquisite Ideal will show the "night" side only, and show it upside-down.

It may have something to do with the history: that card was originally designed as a flip card, then converted to a DFC once DFCs existed. I haven't peered into the site code, but it seems reasonable for there to be some field that wasn't sanitized out properly with the change, which is making the renderer think "Oh, this is still a flip card, and the link text matches the name of the inverted side? Better rotate it 180 degrees."

Or it could be some super-secret Easter egg that's meant to reference morph in some way. Who knows?

Hm. That card had indeed got itself into a weird state whereby the front side thought it was the front of a DFC, but the back side thought it was the bottom of a flip card. Even editing it via the card edit page didn't fix that. I've fixed it via a manual database edit for now, but I'll have to keep a lookout for circumstances that can lead to that happening.