Find Activities and Contact Activities Tab - Petition activities are missing

Found the following issues when testing Petition code on sandbox (http://sandbox.civicrm.org/civicrm):

1. Petition signing activity displays on contact's Activities tab when logged in as 'admin' (the contact who signed the petition). However, when logged in as demo that activity is not shown in the Activities tab selector. To recreate (assuming sandbox not reset since now):

• login as 'admin' user and go to http://sandbox.civicrm.org/civicrm/contact/view?reset=1&cid=102
• Activities tab shows (4) activities. Click that tab and you'll see the Petition activity (subject = 'P1').
• logout and log back in ad 'demo' user, go to http://sandbox.civicrm.org/civicrm/contact/view?reset=1&cid=102 and only 3 activities are counted / displayed in the tab. The Petition activity is missing.

2. Find Activities doesn't 'find' Petition activities
There is an activity in the sandbox w/ activity type = Petition:
http://sandbox.civicrm.org/civicrm/contact/view/activity?atype=31&action=view&reset=1&id=553&cid=102&context=activity

However, when I go to Find Activities and search for Activity Type = Petition - no results are returned (regardless of whether I'm logged in as 'admin' or 'demo'). Not sure if it's because this activity doesn't have a 'target', or ???

http://sandbox.civicrm.org/civicrm/activity/search&reset=1