ThemeKey Properties: NOT installed
Cron runs every 30 minutes
Themekey (Cron cleans up page cache) checked
The only enabled theme switching rule : mobile:device = mobile (switch theme to:) FBG
With Caching mode NORMAL enabled:
Mixed. Sometimes site on mobile device displays FBG theme, other times the other blemarine theme.
Similarly: Sometimes site on desktop displays the desired blemarine theme, other times it display FBG that is intended for mobiles
With cache disabled: theme mobile swiching seems ok.