I'm taking the October and November LSAT-Flex and have been doing practice tests mainly using PTs 60-89. However, I have already used 8 of the available PTs in this range, and considering I am retaking again in a month, I worry about running out of fresh new PTs at some point before the November test. What should I do about this? Start using older tests or focus on drilling to save newer PTs?

While creating a problem set, is there a way to filter for specific questions I have already missed in PTs and create a problem set exclusively out of those?