Nintendo still removing Super Mario Maker levels without warning/explanation

We know that Nintendo said they could remove levels from Super Mario Maker without any notification to the creator, but that doesn't make it any less frustrating. We've seen users complain about this happening, and those users are out to find out why their levels have been yanked. That's what MarioMan847 did, and his results from talking to Nintendo customer service were even more annoying than having his level taken down.

“This is the first time this has happened to me. I mean, I knew it was possible for unpopular levels to get deleted like this....but man, it just really sucks because it doesn’t even let you re-upload the levels at all. I would have to completely re-build it from scratch. It’s just surprising because the levels were only up for a month which doesn’t seem that long.

(The Nintendo customer service rep) looked it over and said that my account doesn’t have any activities in violation and is clean. I told him the course ID and the name of the level (Cannonball Blitz 2) and he said that the name and the level screenshot are completely fine, and even encouraged me to remake the level and upload it again if I wished. So yeah, I got nothing. Probably the only ones that really know are the ones that came up with the algorithms at Nintendo of Japan.”

Having your levels removed just one month after having uploaded them? That sounds like a bit too early to take action, especially if we're looking at removal due to the levels being unpopular. If the customer service rep can't find an issue and the account is in good standings, what in the world could be the reason for removal?