Saved my device
I have to say thanks to all of you, thanks to you all, I have "saved" my device from the horrible samsung customer support as they would take close to 2 months to solve the problem ( if they could solve the problem to begin with )
So let me tell how it went.
I started by rooting my device and ?I followed this link: watch?v=6Rc17Hj11RM&list=UUWhQwvCaC2ZMkCnrC15NfAw[/url]
Then I installed a custom recovery ( CWM ) via Odin and made the backup of my device.
After that, I installed the file T320XXU1BND3_T320OXA1BND3_BTU on my device via Odin and everything seems 99% better now ( still have to test it a bit more, but after a full day of use, no more tapping twice after trying to scroll and no more undesirable clicks )
My device was bought in Brasil, and I had no problem after the installation.
The Build number shown in the device is KOT49H.T320XXU1BND3.