Can't get access to SOME protected pages

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Can't get access to SOME level0 and level1 protected pages even though logged in as user with level1 access (yet other pages with same protection level grant access).

Example:

Pages with page level protection (granting access):
http://finalbalance.com/members/ (page ID11, requires level0, can access as level1)
http://finalbalance.com/listings/submit-listing/ (page ID49, requires level1, can access as level1)

Pages with page level protection (blocking access):
http://finalbalance.com/members/my-account/ (page ID42, requires level1, can NOT access as level1)
URL redirects to 'membership options' page (non-member page) with this url:
http://finalbalance.com/signup/?s2membe ... evel_req=0

http://finalbalance.com/listings/search-listings/ (page ID51, requires level1, can NOT access as level1)
URL redirects to 'membership options' page (non-member page) with this url:
http://finalbalance.com/signup/?s2membe ... evel_req=1

If you want to test you can login with "s2Member Level 1" access with these credentials:
login here: http://finalbalance.com/wp-login.php
username: testpaidmember3
password: test1234

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Thanks Jason for helping me to troubleshoot these issues!

Solved... most of it was related to cookies (or maybe browser caching), so needed to close and reopen browser whenever testing a new login role.

Some possible plugin conflicts were also identified (still investigating that part).