A change was made in the code in version 3.7.3 to handle multiple occurrences of the various date options (post/page info items). This change caused the use of the %date-modified()% to return the date the post/page was published instead of the date modified.
To fix this issue, replace the module 'bfa_postinfo.php' with the version below. The module can be found in the 'functions' folder in the theme folder.
Make sure to unzip the attached file before doing the replace.