DT-INTs Interrupt handler question

[circuitpro]

I'm using DT-Ints and the interrupt is working ok. I am sending counter results from a rotary encoder to a debug port. That is working too, but I'm trying to put a bottom limit of $00 and a top limit of $48 on the counter, and exit the interrupt handler. Can someone tell me why this doesn't work? It blows right by the IF..THENs and sends bad values out the debug port? Are GOTOs not allowed?

R_ENCODER:
IF DIR=1 THEN
    X=X+1
ENDIF
IF DIR=0 THEN 
    X=X-1
ENDIF
IF X<$00 THEN
    X=$00
    GOTO ENDINT
ENDIF
IF X>$48 THEN
    X=$48
    GOTO ENDINT
ENDIF

DEBUG $82   
DEBUGIN [WAIT(ACK)]
DEBUG $F5
DEBUGIN [WAIT(ACK)]
DEBUG X
DEBUGIN [WAIT(ACK)]

ENDINT:                                               
@ INT_RETURN

[circuitpro]

Should have looked at this longer! Sorry.

If X<0 isn't going to happen.