We see that W3 Total Cache is either still active or its stored pages are being served by WordPress. If you've already set up the plugin to work with mobile devices, you may also want to delete its stored files from your server (via FTP).
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 under Advanced Options > Custom User-Agents to the "rejected user agents" areas in your caching plugin's settings. Remember to clear your plugin, browser, and device caches before retesting.
If you suspect a conflict, you can isolate which plugin(s) may be contributing to the trouble. Deactivate all except WPtouch from within the WordPress Plugins area, clear your browser cache and local data then test.
If WPtouch functions well, you may then enable the rest of your plugins one at a time, repeating the process, until you can identify which is/are causing the problem.