dataguard duplicate log

Hello

I have rac system and single node standby dataguard. When I look at rac log sequence I saw duplicate log like following

******rac1 node

SEQUENCE# APPLIED

---------- ---------

      6136 NO

      6137 YES

      6137 NO

      6138 YES

      6138 NO

      6139 YES

      6139 NO

      6140 YES

      6140 NO

      6141 NO

      6141 YES

SEQUENCE# APPLIED

---------- ---------

      6142 NO

      6142 YES

      6143 YES

      6143 NO

      6144 NO

      6144 YES

      6145 NO

      6145 YES

      6146 NO

      6146 YES

this is rac1 node when I swap to standby server I saw following. is that a problem for my system and how to resolve this

best regards

********standby server

SEQUENCE# APPLIED

---------- ---------

      6128 YES

      6129 YES

      6130 YES

      6131 YES

      6132 YES

      6133 YES

      6134 YES

      6135 YES

      6136 YES

      6137 YES

      6138 YES

SEQUENCE# APPLIED