The TVDB shows 3 remaining episodes, my guess is they are special airing on special dates. The airing order for 3C has jumped around a lot, and these episodes have had dates attached previously. While not at all confirmed:
"Ghost Basket" had a previous air date late October. This oddly suggests a Halloween episode, probably mainly for the American audience, but it would great for a show to address the weird place Halloween is in within Australia, mainly there due to immigrants and Cadbury trying to make it a thing.
"Suprise" previously showed in September, which would suggest a Father's Day episode (Father's day is the first Sunday in September in Australia.)
"The Sign" had a date within December, suggesting a Christmas special.