i don't get it

This happens all the time. I lost 40 cents for no good reason. There is nothing that you can do about it. Just keep on posting and hope for the best! :)

One of the reasons maybe is... when you post in a discussion that was deleted, your earnings will be deducted with some amount too

Some times things like this may happen when Mylot is updating the server or something. I have never known mine to go for days unless of course I didnt post but even then I do get something through my downline.

You will find that actual earnings updates are generated at around the same time every day (mid afternoon Egypt time) but there will occasionally be smaller adjustments happening from time to time as well. I have had some days where my earnings have gone up and down too by a few cents here and there and I can only assuming that this is myLot administration updating algorithms etc which then adjust our own earnings and post scores accordingly. I wouldn;t be too concerned about it dolcias!