If several stop conditions are triggered simultaneously, the EA will always use the Stop Loss that is the closest to the current market price.
If you enter a Buy Position in USD/JPY at 100.12 with FT_Ini = 5; FT_Stop = 0 and Trailing_Ini=5; Trailing_Stop=-5, as your positions reaches 100.17, your first trailing stop would be ignored as FT_Stop would move the stop closer to the current price.