Fixed: duplicated groups/contacts are created when multiple accounts are synchronized
Generaly, auto reload is not needed by synchronizing with Interactive mode and reloading contacts at startup. However, for users who rarely finish Thunderbird, they have to reload contacts manually with the settings. So, the auto reload option is added for users who modify contacts at Gmail while Thunderbird is working. I recommend the option only for such users and don't recommend you to set small number such as 0.1 since reloading contacts frequently will lower the performance of Thunderbird.