The bugs you are having with the cavebot are due to you having a slow pc. Seriously. The only thing you can do, is download the source code, and compile it yourself with increased timing delays to allow your pc enough time to process things.
The flickering for the light is normal. Every time something is updated in the client, the light value is restored to it normal state. The bot then resets it to max light. Hence the flickering. I could NOP the light value method in the zezenia client, but meh.
The timing issues of the cavebot wont affect the healer or spell trainer though if you want to use those.