Can we see a picture?

I have no idea about the wallpaper but the light should be centered on the table. We would need to see the space and the wallpaper

It looks like it's centered between the cabinets (excluding the halfmoon shelves). It doesn't bother me for some reason, probably because there's no symmetry in the space so it's not "off". A single blob pendant probably wouldn't work though.

@old1997new We have similar problems...but i think yours is harder to resolve. We designed our island as the centerpeice, with the coffer evenly bordering around the island...then on each end of the island is a 42" fridge, and a 48" range with outside edges aligned. So it was designed to be able to have the "general" can lighting centered on the fridge and the range. To do this, a 3" differnce in location from the lights to the coffer border would be required, but you would never see this difference with given that the lights are 4' from the coffer border. You seem to have a range/upper cabinets which are themselves symmetric, with an island that is offset from them. However, the can lighting looks like it might be located to be symmetric around the island..or maybe just evenly spaced with no reference point? I am pretty particular about this sort of thing, but you have pendent lights to "frame" the island, and I would say those can lights should be located based on the major feature, which is the range. This is just my opinion, and it seems to me like a contractors job is to make you think that the fact that they did it "the right way" no matter how careless they have been. In this case it is hard to make the argument that it is "wrong", but it would have been simple to locate them better with a little bit of thought. Funny story...as they were drilling the 4" holes, they actually messed up the location again. Like...the dude didn't measure to make sure they were on a centerline. Some people just don't care about details...so it is up to you to make sure you get what you want.