So long as KLD has more 50%+1 of the shares in Sunderland, or in any entity which owns 100% of Sunderland (equally plausible), he has full control of any appointments to, or dismissals from the boards of Sunderland and all its subsidiaries.
The directors of Sunderland are KLD, Igor Levin and Patrick Treuer.
The directors of SAFC are the three above plus MLD, Steve Davison, Juan Sartori, Simon Vambuca, and Dave Jones.
Of those, only Vambuca is thought to represent the interests of Donald and Methven.
It's thus clear that KLD has total control, in management terms, of the strategic direction of the club by a simple majority of the boards being his appointees.
Yes, the confirmation statement is wrong, and that's a consequence of having no-one in place with a proper handle on company secretarial requirements. Hardly a hanging offence.