>>/23033/
It could be that the same VPN IPs you're trying were already used by.. as I look at the bans: Russian beauty products spam, jews who blatantly trolled this board, Johnny dipshit Neptune, AIDSkike ("Americans this" spammer) and very rarely, pedos. But I have no way to be sure.
What I don't do is ever change the ban type to wide range or narrow range. It has always been single IP.