I haven't explained myself properly. I tried altering the default stake to the minimum of £2 by altering the settings and it did not work. My settings say default stake is £2 and I save this. Now, after I shut down the program and reopen it, the default stake is £ 4.
Very strange thing just seen - two simple triggers show that they are being applied to two different races even though only one market. I'll try to reproduce this and get back.