You also changed the behavior of '#', which is supposed to give you an immediate connection to the LINE Port. To direct 911 to SP2 without interfering with '#', use:
PHONE Port OutboundCallRoute:
{([1-9]x?*(Mpli)):pp},{(<#:>):li},{911:sp2},{**0:aa},{***:aa2},{(<**1:>(Msp1)):sp1},
{(<**2:>(Msp2)):sp2},{(<**8:>(Mli)):li},{(<**9:>(Mpp)):pp},{(Mpli):pli}