I have a situation in which "which -a python" is not showing execution order when run on CentOS 6 with Python 3.7

Does anyone know where to begin with debugging this? [chuck@vmlnx-tacx32 openssl-1.1.0h]$ which -a python /usr/local/bin/python /usr/bin/python [chuck@vmlnx-tacx32 openssl-1.1.0h]$ /usr/local/bin/python Python 3.7.6 (default, Feb 23 2022, 13:10:48) [GCC 4.4.7 20120313 (Red Hat 4.4.7-23)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> exit() [chuck@vmlnx-tacx32 openssl-1.1.0h]$ python Python 2.6.6 (r266:84292, Jul 23 2015, 14:41:34) [GCC 4.4.7 20120313 (Red Hat 4.4.7-11)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> exit()