Well I tested the disc and it was far more successful than simply burning layer0 to a single disc. Menus displayed corrected and the erratic player behavior ceased.
However, there was another anomaly that was a little confusing. The player was recognising the number of chapter points, but jumping/skipping to anyone of them restarted the feature. I have triple checked my script but cannot find any errors in comparison to previous projects.
I have remuxed the entire project and am currently burning a second test disc. Fingers crossed this one works!
Back on topic though, the layer splits were originally 73% and 45% for L0 and L1 and the burn patter on the disc suggested this. I have set the layer break point for this burn so that L0 is almost to capacity. An increase in the burn area size will suggest ImgBurn is indeed splitting the layers the way I am specifying!
Personally I think its doing a very good job. The errors I am seeing are likely to have originated from my disc project. Fingers crossed I get some sort of consistency from here on out, cause I have a few BD-50 jobs coming up!
Cheers,
Samson