It shows that there is no party list seats to 'top up' to get national up to their party-vote share: because they're actually six electorate seats above their 29% share of the party vote.

Or to put it a slightly different way: national is over-represented by their 42 electorate seats than their party-vote share.

42/120 is 35% of seats but they only got 29% of the party vote (so should only have 36 seats).

TPM also has more seats than their party vote proportion.