Map select - Select what map you are playing and it should direct you to a page where the respected map data is stored.
Last "boss/special" round - Here you must input the last round you saw/dealt with the boss/special round.
Next "boss/special" round - Depending on what you have entered for the previous round, this should let you know when to expect the next one, clicking one of these will submit a new value and it will be sent to the history section below.
"Map" history - All of your previous boss and special rounds will be stored in this section, with the latest one being displayed at the top, as well as a little counter next to the enemy type to show how many of that particular round you have had so far. If you make a mistake click the undo button and it will remove the last input, to clear everything in this section just click the "reset" button.

Note: If any of the round info is incorrect please contact me and I can update it, thanks - Gashy.