As we mention in that post you referenced, we switched to wider angle LEDs for a short while in 2013. We switched back to the original LEDs and have been using them ever since. There is some amount of variation in them, but within expectations.
I asked for additional pictures because I don’t fully understand what is going on with your kit. The width of the lit-up areas is similar between all three colors as we would expect. I was hoping to get additional information that would help me diagnose the problem.
I will help you to resolve the problem and am happy to provide replacement parts as needed. I need for you to help me to understand the problem both so that I can help resolve your specific instance but also to look for wider problems that could affect other kits.
If you would prefer to reach out via email, you can use the contact form.