Code:
inp:
if but=1 then
mem1=mem1+1
endif
if mem1>12 then
mem1=1
endif
write eep1,mem1
return <<--- return to where? Maybe GOTO Init?
RETURN should only be used when you GOSUB to get there.

Also this;
Code:
high stops
low turnsign 
low bottom
May also lead to trouble. It can cause read-modify-write. Sometime it's best to write to the whole port at once instead of multiple high low statements together.

What happens if you place a PAUSE 500 after each line where you try to set or clear turnsign?

Sometimes there may be a little more capacitance on one output than others, and setting of clearing port bits one-after-another will cause read-modify-write. The value you expect on an output may not be what you expect since the 2nd bsf or bcf operation causes the previous pin to be read back (before it has changed) and written back to the pin.