Fast Change has its limitations, and this is not the only one. May times the graphical chart makes sense in a certain way, while the textual chart, such as a Straight table, looks strange with the same settings... The work around it is have a container and keep two distinct objects - the Combo Chart with its set of settings, and the Straight Table with a different set of settings.
Even though it's a bit more work, you become completely free in your choice of expressions, dimensions, colors, other visualizations that you couldn't implement within the boundaries of a single object.
I tried to reproduce the problem with different data. The combo chart seems to work as expected. My test application is attached.
test0130.qvw 160.2 K