org-agenda-custom-commands 通过 category 过滤疑惑

Org-mode
1 
(setq org-agenda-custom-commands
      '(("c" "Simple agenda view"
         ((agenda "")
          (alltodo "" ((org-agenda-category-filter-preset '("-tickler")))))
         ((org-agenda-compact-blocks t)
          (org-agenda-repeating-timestamp-show-all nil)))))

我是这样写的，但是 org-agenda-category-filter-preset 会把上面 agenda 中的也过滤掉，求助。