Thank you for contacting us.
I can confirm, the board initially loads only the first 8 rows. If you scroll to the bottom, a button (arrow) will appear for loading the next 8 rows. There is a restriction for the number if items per cell as well. If there are more items that are not loaded yet, a "Show more" button will appear at the bottom of the cell. Clicking that card will load more items.
Unfortunately, we do not provide a way to edit these restrictions, but as I mentioned above, you can see the items you are looking for by navigating with the board "arrow" and "show more" buttons. You can also apply more specific filtering to limit the number of items on the board. Here is some more info on how to configure board views: http://docs.telerik.com/teampulse/user-guide/interface-guide/views/Configuring-Board-Rows-And-Columns
Please, do not hesitate to contact us again if you need any further assistance.