If you do not have caching plugins active the next step is to check for any cloud-based caching services and server-side caching that may be active.
Because caching happens well before WPtouch triggers, it is important to set those systems up to reject mobile user agents. That will prevent them from storing content in the mobile theme and serving it to the inappropriate browser.
To configure your caching plugin not to cache mobile pages nor to serve cached pages when mobile devices are detected, enter the user agents found in the documentation link below to the “rejected user agents” areas in your caching plugin’s settings. Remember to clear your plugin, browser, and device caches before retesting.