There are 240 stat points that you can put into either STR or INT.
You get 3 for every level.
A 1:2 build means you put 1 in STR and 2 in INT, or vice versa.
Another in my opinion better way of tracking your stats is by balance. If you press C you will see PHYS and Magic balance.
http://bobtheveg.dyndns.org/SRO/Char_Build_Applet/
click on the head
raise the character lvl, and add stat points and watch the balances change.