"Stage finished", but can't go access old questions?

So, I've been wanting to practice a lot of analytical reasoning, so when going through stages one and two, I mostly did their ordering, grouping, and mixed setups, and changed their difficulties after completing one to try the next. But then, after completing some, eventually it tells me I've "completed this stage", but I didn't get to do all the reading comp and logical reasoning practices from those previous stages. When I click back to the old stages, it just shows my completed ones. I want all the practice questions I can get, is there any way I can still get to those?

Additionally, tried one of the timed-mini sections, which was fabulous, but only presented itself at the end of stage 2. Is there a way I can access other mini section practices? I think that would be more beneficial than the binary choice of one practice sample (with multiple questions), or an entire practice test.

Grant