I may know what the problem is. If you are using a PROXY SERVER or some other machine as a gateway to reach Einstein@Home over the network, please make sure that its timeout is set to at least 100*N seconds where N=# of CPUs on the host machine.
Please see this thread for further details:
http://einstein.phys.uwm.edu//node/12956
If the proxy server timeout is smaller than this number, then what happens is that the connection is broken at the host end, BEFORE THE SCHEDULER REPLY EVER REACHES THE HOST. This causes the scheduler reply to be lost, and hence for the WU sent to a given host to be lost. Thus the host runs up against its daily quota limit.
Cheers,
Bruce
