As you can see on steemd.com, the @abit account has multiple posting keys. Actually the account is being managed by a team, they are:
These are active and responsible steemians that I trust. The first 4 usually vote for #cn posts. The last rarely vote but usually unvote to correct inappropriate votes, since he is a @steemcleaners member. The other 2 keys are owned by me.
If you have question about why the @abit account has voted on a post, please feel free to contact the team members. Specifically, @oflyhigh knows how to check which team member (or if it's me) did a vote, then it's best to directly contact that member. Perhaps @oflyhigh will public his tool so others can check directly.
By the way, the @adm account is managed by a few members of @steemcleaners with similar setup. @adm also delegated some SP to a few curators that I trust.
Thanks for your support.
@abit 账号的点赞权限，使用多重签名方式由下列团队成员管理。
主要点 #cn 内容。其中 @pfunk 主要负责取消点赞或者踩贴。我偶尔也会自己点。如果对 @abit 的点赞或者踩贴行为有疑问，请联系团队成员，其中， @oflyhigh 知道如何查出到底是谁点了，以后可能也会公布工具让大家都能查。
另， @adm 账号的权限由 @steemcleaners 管理，用来踩抄袭贴、身份伪冒、骗子、垃圾帖，使用频率很高，已经很出名了。 @adm 也代理了一些 SP 给其他社区成员。
谢谢支持。