Black(ish) dots now with photos...HELP!!!

The ladies are about 7 weeks old. There IS a gnat problem that we are taking care of but I don't know if this is related. There are small (guessing less than 1mm) dark dots on the branches.There are dozens on each tiny 2 inch branch. It started on the lower ones & is working it's way up. I have looked as closely as I can (only have a x6 magnifying glass) but I never see them move & don't THINK they are bugs...no webs or anything. Some of them look as though they are actually IN the branches...under the layers of "skin". These are indoor & under florescent until tomorrow. They look pretty good...a few curled leaves & what looks like a nut issue on 1 or 2. I've also seen things that jump like fleas & are about 1 to 2 mm,oval, gray, & have long antennas. I'm not sure if they are even "bad bugs" & have only seen a few since we sprayed a few weeks ago. I'm not even sure if this is normal or not...I've never noticed it before or seen any on close up pic's I've looked at. If there are ANY suggestions to help me figure it out I'd appreciate it TONS!!! Thanks for the help.
P.S. Please ignore the leaves being dead...I had to cut them off & put them into a baggie that had been used before so you can ignore the cat hair & finished product residue on them...they looked clean except for the dots & the nut issue.