Thanks again for all the great responses. It is definitely an engineered hardwood, but a very cheep one. I took out a couple pieces (the gap got that wide ~1cm now that I could remove it with no trouble) and found that the cross section is mainly a particle board type material and 2mm of hardwood on top, see linked images below. I removed some of the cabinet baseboards and 1/4 round and found that the cabinets are not installed on top of the floor and there is a 1/4 or more gap between the floor and the wall. However, there was no glue joining the pieces together. I did read up on this and found that gluing is not necessary, so could this all have happened due to potentially not letting it settle during installation? Also, I believe this is a floating floor because below the cushion layer the floor is concrete which would not allow nailing. So, is this occuring because the appliances are on top of the floor?
Photo Album - Imgur