Does not switch to iPod theme

I have Browscap 6.x-1.1 module installed. From the Mobile Tools package the Mobile Tools and Browscap (Mobile Tools contrib) are switched on.

I have following configuration of Mobile Tools module:

on tab Notification / redirection
1) Mobile URL and Desktop URL are same.
2) "automatic redirection of the mobile user" disabled

on tab Theme Switching
3) "Switch theme for a mobile device *" is selected
4) "Theme X" is set on the "Mobile theme:" to be default mobile theme
5) For iPhone and iPod - "Enable filter for this device group" is enabled
6) "Theme Y" is set to be served to iPhone and iPod users

However, if I access site from iPod, I always get default mobile theme "Theme X". If I set Theme Y as a default, then I get it on the iPod, but it means that all other mobile devices will see this theme, but I need it only for iPod/iPhone.

Please advice, may be I am doing something wrong, may be this is not a bug.