dominion machines has a piece of software in them called GEM which they sold to ALL of the other voting machine companies.
GEM sets what they call weighted voting. Which gives some peoples vote worth more then others. in This illustration showing Bill Smith has less of a vote then the other two. When weighted voting is turned on it doesn't inform the voter.
https://archive.vn/rrteX/4c4528e2516bec0f40f86a1898bb6e8584004110.png