* SECURITY: General improvements and sanitization of the codebase. (@andrewlimaza)
* BUG FIX: Fixed an issue where more than one order would be created mistakenly when there were different payment plans for a level. (@andrewlimaza, @dparker1005)
* BUG FIX: Fixed an issue with the "Address for Free & Offsite Levels" Add On would not show billing fields. (@JarrydLong)
* BUG FIX: Fixed an issue where the `[pmpro_member]` shortcode would throw a warning in certain cases for Pay By Check members. (@JarrydLong)