Saw an unexpected extra credit with the 12/07/2019 12:06PM statistics run and had trouble figuring this out. Eventually the below 2 results show on the website as valid.

MCM1_ 0156551_ 3920_ 1-- 3113135 Valid 12/5/19 02:03:29 12/6/19 04:53:00 4.53 / 4.74 126.5 / 123.9
workunitId=1379563447
Quorum detail
MCM1_ 0156551_ 3920_ 0-- Microsoft Windows 7 Ultimate x64 Edition, Service Pack 1, (06.01.7601.00) 741 Valid 12/5/19 02:03:37 12/5/19 22:01:13 2.78 121.3 / 123.9
MCM1_ 0156551_ 3920_ 1-- Microsoft Windows 10 Core x64 Edition, (10.00.18363.00) 741 Valid 12/5/19 02:03:29 12/6/19 04:53:00 4.53 126.5 / 123.9

MCM1_ 0156566_ 4842_ 1-- 3113135 Valid 12/5/19 00:43:44 12/6/19 01:09:19 4.37 / 4.67 124.8 / 83.2
workunitId=1379513645
Quorum detail
MCM1_ 0156566_ 4842_ 0-- Microsoft Windows 10 Core x64 Edition, (10.00.18362.00) 741 Valid 12/5/19 00:43:54 12/5/19 23:31:20 2.28 41.7 / 83.2
MCM1_ 0156566_ 4842_ 1-- Microsoft Windows 10 Core x64 Edition, (10.00.18363.00) 741 Valid 12/5/19 00:43:44 12/6/19 01:09:19 4.37 124.8 / 83.2

Since they do not get pulled with the API call even after several repeated runs, can't tell what the ModTime is, but suspect something caught up and added them in the cumulative stats. Since my copy made the quorum complete, they must have been sitting there since the morning of the 6th i.e. like 24 hours, unawares on my part.

For your accounting all is fine, but what's problematic is why these don't get pulled when doing the XML retrieve.

PS, they do show in the history of the BOINCTasks utility, but never bothered comparing since what was being sent always would get fed back through the API solution and always resulted in a full 3 way match so to speak.

NB: been trying to post in Web Support & BOINC Support, but get the message "You don't have permission to access /forums/wcg/addpost on this server."

Edit: Seems the problem was the included hyperlinks to the results causing the issue, so removed all but the endings giving the workunitid.