Thanks for coming back to me.
This is a complicated page, with multiple filtered 'datasets' which are actually being pulled from the same library (MPM) in the content manager.
The relevant sections of the page are then set to pull content from the applicable dataset.
(Note: as you can see, while the library has over 40 items, there are fewer than 12 items under each filter option.)
However, the results coming through on the live page do not match the settings of the applied dataset or the filter. They seem to be reacting as if the same dataset has been selected for multiple sections.
Please also note that the content manager data had been synced a few times, and it was only minor changes which had not yet been published (verified when I swapped to the the 'live' version of the content manager). Thanks again for your assistance.