combination 2 switches

I have a unique (to me) switch in my kitchen. It is powered from one circuit. It is two switches, one on top of the other. The top switch operates one overhead light. The bottom switch is a three way switch to an overhead light and fan.
On one side of the switch, there are two silver screws with two black wires. On the other side of the switch there are two brass screws with one white wire and one red wire and one silver screw with one white wire.
When I tried to replace it with a Levitron #5241-1 combination switch (one single pole and one 3-way combination) I ended up with both lights powered from either switch. The break off fin has not been removed.
Any ideas? Thanks.......

 

You state that you did not break off the tab. Is the tab broken off on the original switch? Did you wire the new switch so that it is electrically equivalent to the old switch?

 

The old switch tab appears to be in place. I think I wired it the same. The instruction on the new switch say not to break the tab off for a single power supply. It seems to me I have to break it off to separate the switches though?

 

Use a voltmeter and determine the way in which the old switch was wired. I hope you remembered the exact way in which the old switch was wired.

Use a voltmeter and determine the way in which the new switch needs to be wired. Then connect the wires.

If it's too late to determine how the old switch was wired, then you will have to examine the wiring at the overhead light and at the light/fan and the other switch.