I suspect you are one of those missionary wannabes posing as Muslims.
All Muslims believe that the Quran was unaltered and there are verses where Allah promises this.
So to get down to your claims you missionary, the Propeht pbuh dictated the verses to not only his companions but to thousands and thousands of people. Moreover, he could not read or write but helped them place the suras and verses in order. His duty was to transmit the message and it was transmitted. It was memorized by thousands upon thousands of Muslims.
Moreover, the only thing Abu Bakr did was compile a unified written form. And when it was done, not one Muslim of the tens of thousands who memorized it opposed it.
Try again.
Besides, it wasn't the order of Abu Bakr "the first caliph" (really!!), it was Omar's (r.a.) idea and he was the one who convinced abu bakr(r.a.) to do that.