@HeathenMagic, the PayPal logs (and many of the other processing/trace type logs) are written using a different method than the myDEBUG*.log files. They're written as a "regular" file that happens to have a .log file-extension.

The myDEBUG*.log files are created using PHP's error-handling, as modified by the built-in Zen Cart /includes/extra_configures/enable_error_logging.php script. If you're not receiving these error-indicator logs, then there's something in your PHP configuration that's preventing them from being written to the /logs directory.

You can see your site's PHP error configuration using Tools->Server/Version Info; I've attached the settings for one of my "localhost/XAMPP" setups that contain the error-related settings that might be messed:

Code:
display_errors	Off	On
display_startup_errors	On	On
doc_root	no value	no value
docref_ext	no value	no value
docref_root	no value	no value
enable_dl	On	On
enable_post_data_reading	On	On
error_append_string	no value	no value
error_log	C:/xampp/htdocs/zc155e/logs/myDEBUG-adm-1499810033-259371.log	C:\xampp-5.6.15\php\logs\php_error_log