Barb, here's what I tested, Version 2.1.049.11.
Yesterday downloaded WO and OP (and everything else).
This morning, assembled ALL races for WO. The 0 MTP mark indeed came up on Race 8, but then after a moment it switch to Race 1 = 99 MTP.
I checked Entries for Race 1, then all other races. Every race Entries, Analysis screens and horse PPs appear normal.
I have Paceline Selections Strategy set to automatically select pacelines during race assembly.
Sorry, I was not able to duplicate your screen shots for any race

. May I suggest you restart RDSS, open Woodbine, click the Clear Cache button on the Card Summary screen, then reassemble ALL races. See if that rights things? I'm not sure why that happened.
FYI, when you right-click on a race to reassemble it, it will ONLY reassemble that individual race. To reassemble ALL races, you should Clear the Cache first of all races, then click Assemble ALL.
I will assemble ALL races for some other tracks to see if anything appear abnormal.
Ted