Kaierau A1 coach Walter Edmonds was also concerned consistency was lacking throughout all four quarters.
"We haven't hit our stride yet and need consistency in all four quarters. We ended with a good win and while ours is a relatively new team we have been able to bring in players with experience and that counted," Edmonds said.
"I thought MTA had a good game and their defence took a lot of ball off us, it was just their execution that let them down."
Edmonds singled out Rebecca Alabaster for praise in making a solid transition from goal attack to goal shoot and Kataraina Hakaraia for her performances at both centre and wing attack during Monday's contest.
Neither winning coach on Monday have conceded to a slick-looking unbeaten WHS A1.
"We should have beaten them in round one," Edmonds said.
"We were up by five with five minutes to go and ended up losing by just two - we'll be gunning for them."
Meanwhile, WHS A1 continued their winning run in the Manawatu Secondary Schools A1 grade Saturday competition with a 45-43 win over Manukura Red in Palmerston North in a catch-up game on Monday made possible by a bye in the Whanganui championship.