strange cuz that has never happened to me before.  I have had clients post in the wrong years folder once or twice but I haven't ever had them tell me that they couldn't get in until I invited them again. 

I don't like the checklist and organizer piece of the Link and therefore don't usually use it.  it is too clunky and hard to read so I always remove that when I initially invite a client and again I've never had to re-invite before. 

But I will give that a try I guess.