What have I done - A side blinker story

Well I've always wished that the side indicators on my '73 Valiant could blink for safety reasons in town and thanks to
http://danielsternlighting.com/tech/markerflash/markerflash.html

I was able to make just that happen cheaply, quickly, and easily.

:banghead:BUT NOW:banghead:


When my parking lights or head lights are one, so are the turn indicators in the instrument cluster speedometer. Not blinking, but steady.

What can I do to either remedy this, or to just do away with the cluster indicators? Because if it comes down to it, I'd feel better/safer with blinking side lamps than having working indicators.