Shared data file on Google Drive - change in behavior

[Bob Fuller]

I'm working with my son in another city and we set up a shared database in
Google Drive. We're both using GnuCash 2.6.3 on Laptops, me on Win7 64-bit
and him on Win8. For several days we interacted successfully observing that
only one could work on the file at a time.  Either of us could make changes
and save the file and quit. The other of us could then open GnuCash and see
all the changes.

A couple days ago when I tried to access the same file GnuCash
automatically opened a file from two days prior.  When I tried navigating
to the shared file on Google Drive from within GnuCash I can see all the
.log files and any .LCK files but not the current .gnucash file.  I can see
all of these on Google Drive.

I can't identify any change in our procedures from one day to the next.  It
worked just fine for several days and then this hiccup occurred.

Could someone recommend a way to restore normal behavior?

Thanks,
-- 
Bob