I would recommend you take everything KCC told you about the AOS process with a pinch of salt. KCC is clueless when it comes to AOS, they have no idea who does what when - they have no idea how the FOs operate so they're not in the best position to tell you to expect your IL or the interview itself within one month of your FO getting your KCC file.
And what they told you re case file taking one and half weeks to get to the FO is BS. KCC is known to give conflicting and crappy information regarding how long it takes for the FO to get the KCC file - they've been know to say it takes 4 weeks also, when the file actually gets sent electronically.
By the way, if you take a look at the past AOS Timelines spreadsheets, you'll see that the St Paul, MN FO is used to handling DV based AOS cases. The number of IOs within that FO who are aware of DV based AOS process is commensurate with the overall number of all the IOs within all the FOs who understand the process - nothing unusual about the small number.