hi
i have tested your triggers and the reason why it placed the bets, is that you have the condition any selections lay price is equal or less than 1.90.
now what happens is the lay price hits say 27.00 and then there is no price available so it goes blank, this tells the trigger that the price IS below 1.90,then somebody offers a price of say 800.00 and your trigger places the bet.
i have altered the trigger condition to
any selections lay price is between 1.01 and 1.90
this will only record the selection if there is a price available.
mcbee
download the trigger below