Complex sentence: Many jurisdictions also record the order in which voters vote, thus possibly compromising the secrecy of the vote, unless there is more than one voting machine which would make it difficult to match between the voter list and the VVPATs.
Split into simpler sentences: Many jurisdictions also record the order in which voters vote, thus possibly compromising the secrecy of the vote. If there are multiple voting machines it would be more difficult to match between the full voter list and the VVPATs.