Other than suggesting you get a beam scale, I would suggest you try something that might help....
I do not know what size the scale "pad" is on your electronic scales, but try putting jacketed bullet that you know is of a certain weight( Like a 158gr./38sp., or a 230gr./45ACP, etc. ) on the scales "pad", off to the side & then place the little pan on there as well, then "Tare" the two together.
Then try weighing powder in the pan from the scoops & see if it stops the scale from wavering & being inconsistent.
It may be that the scale just does not have the amount of weight on it to be accurate & steady, but adding a bit more weight may make it get more consistent for you.
Just a suggestion, but it may help & is easy enough to try anyway.
I use a beam scale to check my loads ( + I have a check weight set, but bullets work too) , whether it be from one of the measures or from the dippers. The only time I did not use the beams is when I am not at the bench, like at the range or somewhere else. Then I just use the dipper & stay below the amount required for safety, or I use my litte FA elct. scale I got for weighing boolits & powder a while back. I just did not trust it if I was getting close to MAX suggested loads, so I just went to using the beam most of the time.
Anyway, I guess I rambled a bit. Gonna go hit the rack.
G'Luck! and if the suggestion works for ya, please share that it did! I'd bet no one would mind, as it might help someone else too later on if they read here.