It's not a matter of space, like the name box; I can fit everything just fine without it being cut off, but when I try to save I get an error. It's really strange.
That's a hard question to answer. Honestly, I'd lean towards it being legit over not, but who knows. The cover arrived in similar packaging and I'm pretty sure it had some pack-ins the circle usually provides. I don't know if it was just a defective printing job, supposed to be that way (I highly doubt that), or what... but it doesn't look like it should.
And I wouldn't be that worried about the price, honestly. The cover is over a year old, so he's likely been trying to sell it for awhile now without any luck. It's not a buyout either, so there's a fairly good chance that once someone bids, other people will realize this is their last chance to bid on it and do so. Mandarake also sold on at one point for 8000 yen, so you're probably fine.
Edit: Apparently it might have been a matter of space, but it just didn't have a visibly cap like the Kanji box; switching United States to USA appears to have allowed it to save.
On the cover note, my guess is that it's probably legit, but it just looks like the colors should be a lot darker. My picture isn't the best to see the level of fade, given I probably had to use a flash, but here's a face shot + the sample image: