Why Did Some Maori's Sign The Treaty Of Waitangi And Others Not?

Signed in 1840, the Treaty of Waitangi is an agreement between the British Crown and Maori. It established British law in New Zealand, while at the same time guaranteeing Maori authority over their land and culture. The Treaty is considered New Zealand's founding document. In remembrance of the day the treaty was signed. There is a national holiday in NZ called 'Waitangi Day'.
With the signing of the Treaty, British Governor William Hobson declared British sovereignty over New Zealand, and the colony of New Zealand was formally proclaimed on 3 May 1840. This caused an increase in the number of British migrants to New Zealand. However, since that date, major issues concerning the original translation of the treaty from English to Māori have resulted in the terms of the Treaty being in dispute. The Treaty subsequently remains the topic of much controversy and political debate.

Maori thought that they were going to receive gifts and they would be able to go to Britain.