Hello!!!
I was finally able to disable the PObox keyboard, not sure if it is the best option, but it was really pissing me off... :banghead: ups....
1- go to settings/app/adm app/all/PoBox Touch
2- delete data
thats all..... It worked for me, but please before you do it googleit a litle more.. not sure if it will have a second efect..... or ... something...