Rally (especially on World level) is very small, and there always will be some common things/links between the teams/drivers, etc. Like Tanak for the moment - still linked to Malcolm because of paying back money (so Malcolm needs to know about Tanaks contracts immediately, as that's all part of their deal) plus OT Racing is running Fiesta WRC, and Ott himself driving Toyota, etc. So no chances to make it all 100% clear and separate.
Regarding contract signing, anouncments, etc it's also not that simple, as if Hyundai signs Ott they would like to announce it with big boom (as it should give them some marketing feedback). But as Ott is under contract with Toyota at least until the end of the season (probably end of the calendar year) it can't be done in the way Hyundai PR would like to make it, so that is obviously important reason od "delay" (if there is anything to announce