Gravity Waves

How many cores are in your computer?

If you want to crunch those type of tasks, just make sure you have a relatively low work cache size when you request them.  The current run is a 'tuning run' to sort out any problems before the main run starts.  These are regarded as test tasks and normally you need to 'allow' test applications in order to get them.  Your computers are 'hidden' so it's not possible for us to really see what is going on unless you 'unhide' them or tell us the hostID of the machine you want help with.

No you can't - nor should you need to.  If you just allow 1 task to complete, and it took two days, BOINC would immediately correct all the other 1 day estimates to show 2 days.  The estimate is set by the project at the time the workunit is generated.  BOINC will always refine the estimate by itself based on local crunch times. It will be quick to increase the estimate (if needed) so as to avoid overfetch of tasks.  You need to play your part by not setting a large work cache until you see how long the first tasks really do take compared to the estimate.

Do you mean non-preferred applications?  My understanding is that this box is not checked by default. If you tick it, you give the project permission to send whatever work it wants to send you rather than work for the search you want to participate in.  Perhaps that is how you managed to get GW tuning run tasks in the first place.  It may have changed more recently, but initially to get tuning run tasks, you needed to 'allow' test tasks to be sent, as mentioned above.

When you first decide to try out a new and unknown search, you should always lower your work cache setting (you can do it locally in BOINC Manager) so as to get one or two tasks only, and see how they go.  You can easily ask for more if they go quite quickly.  As has already been mentioned, it's just a simple click to set 'no new tasks' for Einstein if you get too many at the first request.  With a 1 day estimate, you must have had a large work cache setting to get so many at the first request.

Please realise that an i3-6100u is a low power, low frequency CPU designed for mobile devices.  It has 2 cores and 4 threads so (in theory) you can run 4 separate CPU tasks.  That might be OK for low demand 'office' type applications but not for scientific number crunching.  This draws a lot of power and generates a lot of heat.  If your cooling system is just standard notebook grade, it won't be able to cope with heat dissipation and you risk doing damage by running it 24/7 with all cores crunching.  At best it will throttle and tasks will take a very long time to complete - which you seem to be seeing already.  You should be paying close attention to temperatures and tailoring the load so as to avoid overheating and throttling.  You could experiment with turning off HT so that it will only run two tasks at a time.  They should run a lot faster that way.  The added benefit is that BOINC will know to fetch for just 2 threads and not for 4.  You haven't told us how you operate the machine - I'm just assuming the worst case scenario.