How to automatically skip intermediate redirects?
Use the Rules module with a custom  rule which looks like so (in Rules export format):

{ "rules_redirect_multiple_paths" : {
    "LABEL" : "Disallow multiple paths",
    "PLUGIN" : "reaction rule",
    "OWNER" : "rules",
    "REQUIRES" : [ "rules" ],
    "ON" : { "init" : [] },
    "IF" : [
      { "text_matches" : {
          "text" : [ "site:current-page:path" ],
          "match" : "about-us\\d+",
          "operation" : "regex"
        }
      }
    ],
    "DO" : [
      { "drupal_message" : {
          "message" : "Redirect to path about-us ...",
          "type" : "error"
        }
      },
      { "redirect" : { "url" : "about-us" } }
    ]
  }
}


Some details about how to use read this rule:


Rules Event: use the "Drupal is initializing" event, to ensure that the rule gets triggered BEFORE the actual content (of a path to be redirected) is shown. If you'd use an event like "content is viewed", you'd be too late, the content "would" already be shown.
Rules Condition: verify if the path to be redirected matches any of the paths you want to be redirected, such as about-us01 or about-us02 ( * ).
Rules Actions: 


Show a message about the redirect, which is just for QA testing (feel free to remove that Rules Action after you saw it working).
Perform the actual redirect to the desired page.



( * ) Note that the actual Regular Expression I used goes a bit further: it would also perform a similar redirect for paths such as  about-us03 or  about-us456, though it would not trigger such redirect for (eg)  about-us/789. Here is an attempt to translate the various parts used in the regular expression about-us\\d+:


about-us: it must start with about-us.
\: escape character.
\d: it must be followed by a digit (anything from 0 to 9).
+: it may be followed by 1 or more of the preceding token (so one or more extra digits).


PS: If you're struggling with regular expressions, then have a look at RegExr.