Hi Rob,
Are you still using version 2.2 of Tyk? In older versions of Tyk, it wasn’t possible to process an update made to the Middleware from the Dashboard. This would have meant that any changes that you made to the API definition from within the Dashboard would have automatically overwritten any Middleware settings that already exists on that API definition. This should no longer be the case in the latest version of Tyk as it can now process requests made relating to Middleware.
To solve this problem, it might be worth upgrading if you haven’t done so already. Instructions on how to do this can be found at this link.
Kind regards,
Jess @ Tyk