I am having the same issue in some cases.

Sometimes i revise a group and i notice comments that i was not notified about.

Hello medf ,

Sorry for late reply to this,
Do you mean that system notification or email notification?
Can you try discover process from your backend > Easysocial > alert > discover > start scan
And see how it goes? If still the same, can you provide us with your Joomla backend and FTP access so we can help you check on this?

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Hello Eddie593,

Do you mean that when you update some group of details then it will not notify to group member?
If yes, can you provide us with your Joomla backend and FTP access so we can help you check on this?

Joomla backend

I meant some times theres no notification i noticed. But its not real problematic yet. Will see how it goes after we update. No worries.

Hello Medf,

The problem is most likely because you did not setup the cronjob yet as looking at your mail activities at the back end of EasySocial, there are quite a number of emails that are still pending on the queue. You need to setup the cronjob for your site as outlined at http://docs.stackideas.com/administrators/cronjobs