Public whip treats abstentions as rebellion

[premasagar]

e.g. this bill had 5 'both' votes, where an MP votes both 'aye' and 'no':
http://www.publicwhip.org.uk/division.php?date=2013-02-05&number=151

Voting 'both' is effectively an abstention:
http://www.publicwhip.org.uk/boths.php

Should we ignore 'both' votes when it comes to deciding on rebellion?