Can't correct voices in Audiveris scanned score
I needed a hymn in a different key, so I scanned it with the on-line Audiveris. Then I converted the score to the needed key (D to C). Both the original score (in D) and the resulting score (in C) has notes assigned to weird voices, with the result that there are extra rests shown and some note values are wrong. This is true particularly in the first measure of a system. Trying to change all notes to Voice 1 or change individual notes to voice 1 doesn't work. The tutorial for changing note voice hasn't helped.
Please explain how to accomplish this.
This may have been sent before in July .AbbotsLeighinC.mscz, .AbbotsLeighinC.mscz, , but I was called out of the country and couldn't follow up. Apologies if this has been answered already. If so, please direct me to the earlier discussion.