Re: [Makura cover soft|SLG]Leane of Legitimate Crown
I expect at this stage inconsistencies on the website are just due to mistakes on the authors part. If you go to the character preview, you'll all nipples are censored (which didn't used to be the case; the characters with white-box censors weren't censored before).
But dartred is right, whether or not a given technique will appease the censors is not particularly well defined, mainly because there is relatively little case law in this area. That means until it's better defined by court cases, the law is being interpreted by laypeople, and that's never good for consistency. (The law in this case is basically "you cannot show genitalia", which implies some censorship, but doesn't actually specify how much you need to censor.)