There's an option to have a bar 'paged' so that you can scroll through different action bars, like the main one on the blizzard default ui. With a little up and down arrow for mouse scrolling, or shift 1-6 to keyboard scroll through bars.

The modifiers are working correctly, so I get a new bar if I hold down shift or ctrl, but I don't have an option to scroll through different main non-modified bars.

This is a little annoying as I had my ui set up so that all my spells were on actionbar 1 (triggered by keys 1 to =) but I could press shift 2 to change to actionbar 2 (still triggered by 1 to =) and have my fishing and portal spells on that bar. I can provide screenies if that would help, I'm not very good at explaining things.