You can use "Result" variables that are predefined in BAS. There are 9 of them.
If you need more you can use filesystem actions and create TXT or CSV files
to store any number you need. Similar to that you can use database for such
tasks too.
Seems to be a bug, if you have tunneling enabled it leaks your ip and if you disable tunneling you can't continue to click to next page on some urls, seems to be a bug.