Mail Merge not agreeing details

[Lawn Bowler]

I am attempting to set up a mail merge to have a monthly report addressed to various clubs.

I have a calc file containing the following headings:
Team; Address 1; Address 2; Address 3 & Post Code.

When I select mail merge from the tools menu and select letter as type of document and address list from the choices things appear to be OK. Selecting match fields from database shows the information in the preview to the right of the list correctly but in the check if the address data matches correctly it does not.

The full information displayed in the first instance appears in section 4 as address 1 and the post code only. The options at the foot of the page only offer Back and Cancel
and I can not seem to be able to move forward from there.

Obviously I am doing something wrong but it totally beats me. Can anyone please offer guidance in resolving matters.