I can't tell if they are under the IR/cover glass or not, but they appear to be drops of a liquid, not dust. You can see a distinct ring out wards from the center.
I would try the following.
Get a good loupe, and a LED flashlight, and look hard at the sensor and see if you can see anything of these spots. Most times these will show up under 5x to 10x mag and good light. A back is much easier to work with since you don't have a camera body to dig down into.
To be honest, if you don't see them, it's possible they are under the IR/cover glass and got on there during the repair.
You have the Phase One kit, but try cleaning again with just solution B, the clear one.
I would try only cleaning with fluid B first. Make just two swipes, with the plastic piece that comes with the kit. The B Fluid should not streak. It might take two series of cleanings but with the leaf wipes and solution B you will get a good clean.
The big issue, is that these appear to be a dried fluid, and I don't think just using the B solution will get them off.
If you have to use solution A:
Use with the same leaf wipes, you can also just use it on a wipe under your finger. Use gloves on your hand so no skin oil can get through. Just rub around the area where the spots appear to be. As mentioned my Jerome, it's upside down from where they show on the image.
After this, use Solution B again. This will remove the streaking you got from A. Again it might take several attempts, but it will do it.
One last thought, is Visible dust makes 2 solutions just for this type of problem, and you might try one of them or both:
http://www.visibledust.com/products3.php?pid=305http://www.visibledust.com/products3.php?pid=303The key is to see if you can locate these spots on the outer surface of your IR/cover glass, as if you can't find them, then they have to be under it and only Leaf can clean that. You most definitely don't want to take that cover off, unless you have access to a clean room, no way can you get it back on without something being attached.
Paul Caldwell