Hi
It is a bit difficult without sight of your trigger to understand the context.
If you have submitted an unmatched back bet you have several actions to choose from:
cancel then back
cancel back
cancel all
cancel back then back at SP
etc.
If you have submitted a back bet and it has been matched:
fire in a lay bet to scratch the back bet
or distribute loss
or spread loss
and then resubmit your back bet
Remember you will always be matched at the best available price, so if you back at 2.00 and the current back price is 2.08, you bet will be matched at 2.08
If this is not what you want, please post your trigger file and will look again.