Both are used and are correct. Different opinions by people usually based on seeds they have recieved from a source that is reliable and thus continue to use that name. There has been lengthy discussion on this here somewhere. Someone will know where the thread is.
I used to label them 7 pot/pod to avoid any confusion but CARDI(Caribbean agricultural research and development institute) has always called the Trinidad landrace variety Trinidad 7 pod so I go by that.
The whole 7 pots of chili was just one person's interpretation many years ago that spread quickly
I remember searching for this chile for many years before there was any mention of them online and even then I was told by Trinidadians they were 7 pods