Help with trailing stop

[monkeyface]

Im not sure if I am way off the mark here.
Im having a wee drama with my set up
I thought if I had my set up the same as the trailing stop loss in the videos on youtube it would work ok.
The problem is I have ticked
Offset bet with greening and trailing stop.
Offset ticks 100
Stop trigger ticks 5
Place at ticks 5
Place fill or kill 30 secs

Now I have had a few trades today that went in the required direction.

say I Backed for 7.0 and the odds dropped to 5.5 then rose up to 6.0 the trailing stop bet kicked in.
However I still ended up with a trade loss and the greening/redding kept fluctuating after the stop loss bet.

I am not sure if i have this right but i thought the trailing stop bet would place the bet and then then that would be it. Bet placed end of story.

Any help would be great

Thanks