Canadians are divided three ways on voting reform:
The status quo (FPP)
Proportional representation (PR)
None of the above (but open to PV ranked-ballot compromise)
This is how two-way referendums tend to play out:
There are two ways to avoid this odious paradox:
Hold a three-way referendum with a runoff election. This ensures Canadians support one voting system with a majority.
Vote splitting killed the PV referendum in the UK — destroying electoral reform in that country. Vote splitting will likely kill another Canadian referendum driving the final nail in the vote-reform coffin here.