Bug in SVN

Hi,

I was trying to display the log message between the dates 2013-06-13 and
2013-06-14 by the following command "svn log -r {2013-06-14}:{2013-06-13}",
if no one has committed from the mentioned date then the log should be
empty but it is showing the last commit which is was committed on
2013-06-11.

If we are expecting a log between the dates 2013-06-13 and 2013-06-14,
it should show the log between the following dates right, not the last
commit. Is it a bug or am using a wrong command? please clarify me .

-- 
Thanks & Regards
Nikitha Annaji