To answer that specific question: no, that's to be expected.
certbot-auto will (by default at least) always update itself to the most recent version. The regular command
certbot doesn't auto-update.
To answer your thread more generic: having two certbot installations at the same time is probably not what you want. They might interfere with each other. Perhaps you have multiple cronjobs/systemd timers running to?
Looking at the version of
certbot and your distribution version, I assume you've installed
certbot with snap? I would suggest to continue using the certbot snap and keep it up to date by the regular update methods that are available. The certbot-auto script is being deprecated and I would advice to remove it from your system. The certbot snaps are also updated regulary when a new certbot version is released.