The 2 postponed games from the start of the season involving Man City and Man United have been slotted into the 2 midweek rounds coming up.
In place of other fixtures that were already there and which will now have to be rearranged themselves, such as Liverpool v Burnley and Man U v Fulham.
No, Burnley V Man Utd is 12th Jan - the other two games are 20th/21st Jan.
Yes, because on the original fixture lists, they (Liverpool v Burnley and Fulham v Man U) were on 12th/13th Jan, as there was a full Premier League programme in that midweek, as per the 2020/21 Football Yearbook (ex-Rothmans).
But now some games have been put back a week to accommodate the rearranged Man U & Man C fixtures.