I am doing most entries on iPhone 4s, and then syncing to the PC database, and from there, syncing to the online database.  I have noticed that I am losing custom entries on sync.  I tried re-entering a few of the custom entries, and found that even though the sync said it completed, one or more of the entries were not made, and, after the sync they are deleted from the local database on the iPhone as well.  After a few times of re-entering (one at at time), I was able to transfer the custom entries.  It seems that it may be only transfering one custom entry for each sync session, and all others are deleted.

I have the latest versions of the iPhone and PC applications.