Data migration from 3.0 to 4.0

FTH 4.0 for my club #5063 has come alive. Had a brief study and found out some points regarding the data migration are different from what I learned from the FTH4.0 intro. Here is what's in 4.0:
   1, "Meetings", all meeting records are gone, including previous, future, saved templates. The system starter templates are still there. There are some operation tabs, ie "Agenda templates", "Meeting history", etc. but they are empty now. -- I thought the meeting records would be transferred. 
  
   2, Membership information still there. But "Meet Our Members" content is gone. -- it's the membership info still there. Member profiles are just minor issues. 
   3, Homepage is still there, with a new header section on top though. But the custom web pages, both public and privates, are gone. --- I am not sure about this point as there are still two public pages there which I am sure were built by us before. 
  Can someone confirm these changes? If it's all true it's become very important to backup the data in 3.0 before 4.0 comes alive. (I am a FTH admin of multiple clubs)
   Thanks.
   5963.toastmastersclubs.org/