Looks to me like the crippled maemo system does not recognize as the filesystem it had mounted before, but found a unknown new partition.
Did you ever create that mmc1p1 mount point manually?
Did you try to again export the partition via USB to your PC? Do you get just another mount point, is it reverting to your first mount point?
Did you consider or how did you expand /etc/fstab to know about that partition?