No, it is on a solder board, but I will check the power/ground pins to circuits. I did check the voltage bus on the board with various combinations of LEDs lit and it stays steady at 4.95V. Thanks for the suggestion.
Can you take a photo of your circuit board, top & bottom side. Just to get a gander at component placement signal,power buss, things like that.

 

Looking at the circuit with those 2 op-amps it looks like there is an error, since there is really not a normal input connection to the second one. The signal from the first stage is tied directly to the output of the second stage, which is very unusual. So really there is no benefit from that arrangement that I understand. Please explain the intended function of the whole op-amp circuit, because it is certainly not a common arrangement. I am guessing that there may even be some oscillation going on. That is a guess based on experience, not a detailed analysis.

 

I disconnected the second opamp and used only the first opamp as the mixer.
The second opamp can be used to invert the output of the first opamp.