The number of corrections is up on last year, when only David Seymour corrected his declaration, reflecting two speaking and appearance fees he had been given and later donated.
Willis said it was normal for MPs to need to correct the register from time to time.
“What I want to be open about and have been from the get-go is that from time to time members do make errors and have made errors. That’s not what’s at issue here - what’s at issue is are they quick to correct them?” Willis said.
MPs are required to disclose their pecuniary and financial interests each year as part of a transparency exercise carried out by Parliament.
If MPs discover their interests were incorrectly disclosed, they are required to correct the record immediately.
Suspended Transport Minister Michael Wood is in trouble for not correcting his pecuniary interest declarations going back to when he became an MP in 2016 when he discovered he owned shares in Auckland Airport and Contact Energy that should have been declared.
The registrar of pecuniary interests Sir Maarten Wevers today launched an investigation into why Wood took so long to amend the record.
“The Registrar noted that Hon Michael Wood had, in recent days, made a number of public statements, including in the House of Representatives, in relation to the need to amend previous returns under the Register,” a statement from the office of the registrar said.
“The Registrar’s preliminary review also took account of the degree of importance of the matter under inquiry; whether the matter may involve a breach of the obligations to make a return; and whether the matter is technical or trivial,” it said.
On Thursday it was revealed the office of former prime minister Jacinda Ardern was informed at least three times about Wood’s failure to disclose the shares, including one time when she was incorrectly told he had sold them.
