I'm having a similar problem like Fixhog. It seems to keep track of who is invited, but it doesn't add them until someone does a !members add <name>.
EDIT: Ahh ok, I have MembersManager V100. Where are the updated files. Also a bit off topic, but my City tracker isn't working ether. I downloaded the newer one "City Cloak Tracker 2" which is supposed to keep logs on who raids the city and when. Not sure if there is a problem with the plugin or maybe something else.
I will PM you separately about the MembersManager plugin - it will be released in a different form in the near future.
You will need to unload the original City Cloak Tracker to use the Version 2 one .. otherwise it will report some 'conflict's occuring. Because the bot can only watch for Cloak change and Alien raid messages, it won't automatically detect the cloak state until it changes. This was the main reason for adding the 'logging' facility, so you could make an educated guess what state it was in last! The final thing to note, is that your bot toon must have the correct rank to 'spot' the cloak/raid messages in the appropriate chat channel; for orgs using the Department form, this is usually Squad Commander. A similar constraint applies for 'seeing' Tower Battle messages if you are using that plugin.