I think this is a deliberate artistic choice in this style, but you can change it by "cheating" a little. The origin of the fill is determined by the lower left extent of the fill, so if you make a little notch somewhere that forces the start of the fill half a grid square down and to the left, you get your desired result. This little notch can then be covered up by the outside wall details:

As for the second question, you add grids to your map using the Hex or Square Overlay command found in the Draw menu.

@Keighn sent me a link with his collection of Jim's Dwarf Home material.

I've uploaded the file to my own Webserver. It can either be downloaded as a complete .zip file (1.6 GB) from http://jimp.monsen.cc/DwarfHome/Crest%20of%20Star%20(Dwarf%20Home).zip or you can browse through the contents online and look at/download what you want at http://jimp.monsen.cc/DwarfHome (The folders there are just an unpacked version of the .zip)

Thanks Keighn.

And note, if anyone wants a copy of the entire site, for example to set up a mirror or something interdependent of me, just ask. But be aware that it is about 7GB of files there now. And if anyone else has more material, I'll happily put it on my server to have everything collected in one place.

If you want, I can host it on my server along with the archived websites.

Unfortunately, there are some holes in my archives because Jim had to change servers a few years back and not all of his migration back then were complete, so his sites had a lot of missing links, which obviously also made it into my archived version in the same condition. I don't think he even migrated all of the older sites at all, leaving them unable for me to archive since the old hosting went down years ago.

Thanks. That should complete this set.

Fixed. Turned out you had been a bad boy. There was an apostrophe in the map filename, but not in the pdf one.....