If you look closely this is the fax reply letter to Sivakumar from former MB Tajol Rosli.
They said that there could be two possible reasons.
From some insiders they revealed that there's been some infighting among UMNO in Perak where 11 divisions of the state are against Zambry because of his sheer arrogance. They also mentioned that Tajol, after relinquishing the state chairmanship was sidelined. And there is a preference for Zambry's men in the state councilship.
Or, it's perhaps the rule of law that Tajol acknowledges that Sivakumar is still the correct speaker even his lawsuits and trials are still pending or Sivakumar was removed improperly.