Turbotax error/malfunction; entries erroneously changed/created by software

TT malfunctioned before my eyes. I checked 1099-DIV entries, and they were all correct. After finishing, I was asked to review an entry which had zeroed out! Upon checking, I found a new entry had been created, replicating an existing one, and 2 sets of numbers had been transposed up, leaving the third one zeroed!