I think it's one of those 'curb your initial enthusiasm' things, take a step back and
give it another go. I've had MANY MANY sharpening systems over the years, including
the Lansky, didn't care for it since you have to clamp and move the clamp and it
can get off centered, so back I went to hand sharpening, which I thought I was pretty
good at

little did I know how quickly the EdgePro would snuff my vanity
BUT, I'm kinda like you, at first try I was like MAN I'M NOT GETTING THIS, so I made myself
S L O W down and take it in smaller steps and now, WOW, I'm selling ALL of my other
stones, just keeping some smaller stones for pocket carry trips.
As for making the blade not move so much, you need to, as others above stated, rest
the blade on the device, need to make it so the blade's as flat as you can, you probably
need to make sure it's NOT resting on the area before the blade, before the grind starts
as that can made the whole blade tipsy.
Then, while it's resting on the base, have the back stop brought up so you just have the
edge out past the edge of the plastic base.
You'll have two points of contact, the spine of the knife against that back stop and the
face/side of the blade laying on the base, your role in this is to just keep the knife level
the stone may try to push the tip area backwards, you need to just keep an eye on that
and don't let it push it backwards, LIGHT pressure is the ticket, it doesn't take a lot but
you get a lot back for your efforts!
I'm not up to using all the polishing tapes yet, I get a very high polished sharp blade by going
up to the 1000 grit and then stropping on a leather strop.
It's worth the effort, just start again, but slower and use a knife you're not so worried
about. And as they say in the videos, I use a black magic marker to try and start with
what the manufacture's initial bevels were at, as a starting point, you can later on go a
little less angle if you need that.
Good luck and hang in there!
G2