Bug in Custom Format for Date

Bug in Custom Format for Date

Hello, good night!

I'm facing some problems in Zoho Sheet, while trying to format automatically dates in my sheet.
Here in Brazil we use the format dd/mm/yyyy...that's what I chose as custom format for my sheet. But if I insert January 2nd, for instance, typing 02/01/2015, Zoho atumatically changes it to 01/02/2015...and thats February 1st.

I don't know why these changes occur. I've typed 24/12/2014, for instance, and it doesn't change to 12/24/2014.

Can u help me please??!