Ask about things you are interested in or curious about. It's not necessary to ask questions in order to present yourself in a certain way, unless this is an interview -- and even so I'd stick to genuine questions.
One of the best things about the LSAT is that you can approximately predict your LSAT score via timed PTs. If you are not consistently hitting around your goal score, postpone -- unless there is an urgent reason not to delay applications.
@harrismegan yes the LR26 is real, as for the LR25 I am assuming one of yours had a double question for the same stimulus, and that was experimental. (Unless there was somehow 3 different experimental LR's)