I have an i5 Boinc 7.6.33 box with a GTX1060 running Seti and Einstein on the GPU. The cache is set to 3 days + .1.
Einstein take 30m per wu when running 2 at a time, Seti take typically 3 to 10m per task running 1 at a time.
When Seti runs the est time for Einstein to up to over 6hrs. This prevents work fetch because Boinc thinks my cache is overfilled. When Einstein runs the est time goes down, currently it's down to 55m. What can be done to fix as it causes it to run out of Seti work on their extended Tuesday outages.

Einstein Task duration correction factor: 0.716186
Seti Task duration correction factor
Edit, I think the problem is caused because I am running gravity waves on the cpu with run times of ~ 12hrs. The question still remains what can be done?