2 is the number of things to roll, like in 2d8. t tells it to roll a table. t[ ] is the table selector. d8min2 is the table name. So, it's saying "roll 2 times on the table named d8min2" If you go into the decks and tables tab, you should see a table named d8min2, which has 7 rows, the first of which is 2 with a weight of 2, then 3,4,5,6,7,8 each with a weight of 1.