Hierarchical Compile. Max Five Levels?

When I use hierarchical compile nothing moves any further right after the fifth level. I’m using a customized profile with .25" increments starting at the left margin. Discovered in Linux; tested also in Windows. I’m on ver. 1.9.0.0 to stay compatible with Linux. Is it a bug? Fixed? Might have to upgrade the Windows version. Thx, kraml.