technically there are two miracles after the raising of lazarus...the resurrection of jesus and the huge catch of fish...that would make nine miracles total...
i have heard it said that john's gospel can be considered to be a work in two parts...first there is the 'signs gospel' with seven signs...and then there is the 'passion gospel' that describes holy week...in addition the first and last chapters seem to serve as a prologue and epilogue...