The dispute has to do with who controls 770. Meshichists or the antis. There had even been a plaque by the cornerstone at the entrance that had the Rebbes name with zy”a but some “angels” destroyed it so now it doesn’t say that anymore.
Basically the ones who were left in charge of chabad/770 is merkos led by Yehuda Krinsky who is one of the latest of the Rebbes secretaries. But of course the majority only follow the Rebbes instructions when they see fit, and they just could not accept that order which came straight from the Rebbe himself. Aside for other documents which were made to disappear.
In general there is a lot of confusion in Crown Heights and the BT’s get hit the worst and also become most extreme whether it’s becoming ultra meshichist or “super chabad” and can’t stop talking about misnagdim and that lubavitchers are such victims. But hey, we all have our flaws….when I say we I mean everyone but chabad obviously.