The fact that the readership is hearing less-and-less about these grading issues is a testament to Mike's "total revamp" of early December 2018 as opposed to modifying the existing code of that time.
With thousands of soccer games and a new data feed this can be a daunting task but Mike has taken Patrick's initial work and improved upon the product tremendously while at the same time dealing with Tennis snafus and Pinnacle's demand of obtaining funded accounts from a USA market that Pinnacle does not serve.
Timothy Wynn and evo still contribute intelligent posts & Mike is also getting help from DapperDans; the future of this site is in great hands.
Note TOO that these matches that were not graded all are possessed of the VERY SAME EXIGENCY of being games played later in the day of 2/27/2019 which may mean something crashed like Mike said in early December about a script crashing; I'm sure Mike is as curious as anyone as to see where things went south on the grading
I'm not sure but it might be helpful to Mike if the readership supply the link to the ungraded match(es) so that he can quickly isolate why the scoring/grading update failed to occur. For example: