I saw u also got this bgc started ghost update few days before Dm... after how many days of bgc started did u get DM??Good development. In our case I think it was still about 10 days to PPR. But the background check itself was very fast. The place you want to watch is the ECAS status switching to DM.
Going forward, don’t be fooled by a lack of GCKEY updates on your eligibility and background check. For us they were only updated after counterfoil and COPR issued.
Best wishes!