Soil mites on new orchid that is potted in soil

[astrid]

After reading all the great reviews about Seattle Orchid, I was excited to receive an oncidium type orchid from them.

However, I have purchased this exact plant from other places, and they all are potted in dirt!! I expected Seattle Orchid would have repotted in some better media, which I found pretty annoying.

On top of that, I noticed today that there are damn little soil mites in the dirt!! Argh!!

By soil mites, I mean these little teensy bugs that look like a light brown or silvery sliver, and crawl throughout the dirt. I had a bad problem with these in a terrarium I made last year, and in spite of spraying the soil like mad with an insecticide/fungicide/miticide spray, they stubbornly remained! How irritating!

So here are my concerns:
1- Will this spread to other plants on the same shelf, or do they need direct contact to spread?

2- Will these guys spread to bark media, or is it too dry and inhospitable for them?

3- Are these known to damage the plant, or are they just an annoyance to look at?

I'm so grumpy to receive such an inappropriate potting media that is also infested with soil mites from a company that has such good reviews overall.

EDIT:
I now think these are springtails thanks to randomgemini's advice.