Diary : navigation bug

Hi, and lot of thanks about this tools. I use it since few month, and i recommended it ...
I upgrade my projeqtor on 4.5.7 version (display version 4.5.6, but my bug is not about this, it's probably mistake on variable definition).
I meet a bug when i navigate on my diary. In fact, if i want to see my diary on September 2015,i can't because when i see my diary for August 2015 and i click to see it on september, my diary show information for january 2015. In add, when i show my diary on September 2014, and want to show my diary on August 2014, i can't because my diary show information for December 2013.

Thanks for all.