The TL;DR version is in bold. Thanks!
ISSUE 1: According to the TBR Biology part 2 book (section 7 - Metabolic Pathways; p. 195 in the newest edition - copyrighted 2016), oxalosuccinate is a beta-keto acid. In fact, the TBR book doesn't even call it oxalosuccinate (or oxalosuccinic acid); they...