For a more accurate report of what happened:
Heat 6 Wood moved before tapes went up, under the rules, automatic restart all four with warning to Wood. Once tapes went up Wood then lifted and cut across/clashed with Jack who crashed entering the bend, under the rules automatic restart, rerun all four or potentially Wood excluded. The ref chose the former.
Heat 8 Movement at the start, under the rules, automatic restart. Once tapes went up possibly first bend bunching (not a rule) so unsatisfactory start or Smith excluded. The ref chose the former. In the re-run Smith rightly excluded so no impact on the score.