OK something has really got screwed up....

Here's the menu routine which is used to set the times for the lighting

Code:
Lighting:

Lighton:
Lcdout $FE,2
LCDOUT $FE,$80,"Set On Time For "
    IF H_butt = 0 THEN GOSUB IncHours
    IF M_butt = 0 THEN GOSUB IncMinutes
    lightsetHR[fn]=Hours
    lightsetMN[fn]=Minutes
    if viv >=2 then viv =2
    LCDOUT $FE,$C0,"Light Circuit ",#viv
    lcdout $FE,$94,#lightsetHR[fn] DIG 1,#lightsetHR[fn] DIG 0,":",#lightsetMN[fn] DIG 1,#lightsetMN[fn] DIG 0
pause 200
If S_butt = 0 then
pause 250 
fn = fn +1
viv = viv+1
hours = 0
minutes = 0

endif
If fn > 1 then 
LCDOUT $FE,1
viv=1
fn=0
goto lightoff
endif
goto lighton

lightoff:
Lcdout $FE,2
LCDOUT $FE,$80,"Set Off Time For "
    IF H_butt = 0 THEN GOSUB IncHours
    IF M_butt = 0 THEN GOSUB IncMinutes
    lightoffHR[fn] = Hours
    lightoffMN[fn] = Minutes
    if viv >=2 then viv =2
    LCDOUT $FE,$C0,"Light Circuit ",#viv
    lcdout $FE,$94,#lightoffHR[fn] DIG 1,#lightoffHR[fn] DIG 0,":",#lightoffMN[fn] DIG 1,#lightoffMN[fn] DIG 0
pause 200
If !S_butt then 
pause 250
fn = fn +1
viv = viv +1
hours = 0
minutes = 0
endif
If fn >=2 then 
LCDOUT $FE,1
goto mainmenu
endif
goto lightoff
so I added the following lines to display the times on the LCD when the program is running
Code:
lcdout $FE,$D4+8,#lightsetHR[fn] DIG 1,#lightsetHR[fn] DIG 0,":",#lightsetMN[fn] DIG 1,#lightsetMN[fn] DIG 0
lcdout $FE,$D4+14,#lightoffHR[fn] DIG 1,#lightoffHR[fn] DIG 0,":",#lightoffMN[fn] DIG 1,#lightoffMN[fn] DIG 0
setting the time on to 00:00 and the off time to 00:01 the LCD displays 00:50 and 01:00 respectively. So obviously DT's routine will never match the times set..... I don't know why this has happened because in the original code it matched perfectly....