Is there something wrong with having this as code:

Code:
pause 500
low PortA.0
low PortA.1
         
pause 500         
high PortA.0
low PortA.1

pause 500         
low PortA.0
high PortA.1
When I run this code where a pin set to the same value twice (A.1 is set low twice) A.1 never goes high when it is supposed to. Does setting a pin to a value disable it?