samsung keypad help

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http://forum.xda-developers.com – hey guys..i have this problem when typing the period "." because even when i tap exactly on the period button, letter "m" comes out which is the letter above it. i have to tap very low almost close to the back button to have a "." very annoying esp when you want to type fast. any help pls? it only happens with the period. when i selected developer tool to see then i'd tap it points just right on the period but still it acts as if i tapped letter M. if anyone has any suggestion i would be really thankful Sent from my GT-I9300 using xda app-developers app (HowTos)