Well I am not sure about how this works, but they have pulled about 12 pavers up so far and then got string and a level out, and then stopped. I presume it's so they know the level they are trying to reach. I would have thought first job would be to lift all the pavers for the area you are working in.
They are there again today and seem to be making some progress. We will see what happens.
They provided a plan and explanation for drainage, and whilst it didn't seem completely necessary, they are going to take it (The $700) off the quote for the lawn relay they gave us, so other than cashflow it won't "cost" any more.
I told them I wasn't advancing any more funds on work completed and after 2 days they agreed.
I guess we wait and see.
You answered you own question I think without seeing which pavers they lifted.
If they took all the pavers away - they would have to calculate the level.
This way they, they can compact the ground and from measuring from the string down down - know how much they have to top up.
I do the same thing with Boxing for a concrete slab - I dont dig the middle of the slab until all the boxing is in and level.
Then with a straight edge across, you know exactly how much to dig.
FYI - Had a tiler in for home downstairs and that was $4K for a nice job using FLC so your price doesnt sound to bad for your pavers and ground work.
Mind you cost me a lot more for laying those fine victorian tiles "Winkleman" in the porch