ByteBuffer is skipping loops?

EDIT: Title should be 'File loading and save not working'

I have a file, and I have written the correct data successfully, and now I want to retrieve it. (This is for saving a very small minecraft build without schematic format)
There is one problem Im very confused with, when I read the data from the file I use a loop like this:

Code:

DataLength = buf.readInt();//amount of loops that should be done (this works)
        polys=new ArrayList<Polygon>();
        for(int i = 1; i <= DataLength; i++) {
            Polygon p = new Polygon();
            p.faces=new ArrayList<Short>();
            p.verts=new ArrayList<Float>();
            int faces = buf.readInt();
            int verts = buf.readInt();
            for(int x = 1; x <= faces; x++) {
                short s = buf.readShort();
                System.out.println(x+" "+s);
                p.faces.add(s);
            }
            System.out.println("read faces");
            for(int x = 1; x <= verts; x++) {
                float f = buf.readFloat();
                System.out.println(x+" "+f);
                p.verts.add(f);
            }
            System.out.println("read verts");
            polys.add(p);
        }

But the problem is, Im getting different results from when the data was written,
Here is the code + whats outputted when i save the data to the file (what should the data should be):
https://pastebin.com/FiFXFRSc
Here is the output from the code above:
https://pastebin.com/A62kpvAj

(By the way, im using data input and output streams)

What am I doing wrong here?

EDIT: I solved it, actually it WAS working, but I didn't read the actual log I posted as that was pasted from thje log file, the console wasnt writing each loop (Becuase it was too fast) and I realised the problem was somewhere else.