On August 30, one of my machines reported two completed tasks, 46391704 and 46391714, which still show with status "Completed, waiting for validation" even though subsequent tasks reported by that machine have already been validated and credited.

If they're stuck in the queue, they should probably be deleted and redistributed.

On August 30, one of my machines reported two completed tasks, 46391704 and 46391714, which still show with status "Completed, waiting for validation" even though subsequent tasks reported by that machine have already been validated and credited.

If they're stuck in the queue, they should probably be deleted and redistributed.

Ig you look on the first workunit you will see this:
46391704 66054 28 Aug 2014, 23:20:10 UTC 30 Aug 2014, 8:25:39 UTC Completed, waiting for validation 6,748.58 6,748.58 pending Period Search Application v102.10 (sse3)
46391705 117159 28 Aug 2014, 23:20:15 UTC 8 Sep 2014, 11:20:15 UTC In progress --- --- --- Period Search Application v102.10 (sse3)

And this:
minimum quorum 2
initial replication 2
max # of error/total/success tasks 7, 20, 20

All that means that while you have returned the unit just fine your wingman has not yet, he has until the 8th, at which time it will be resent to another pc for crunching. This could end up happening as many as 20 times, so in theory you could be waiting a LONG time yet to get credit for that unit.

Your second unit is exactly the same way. Hang in there, there is nothing you can do at this point but keep on crunching and hope that eventually the workunit will get validated by some pc.