Usually the funeral home has a form that they use for the obituary--they will ask questions and fill it in, then have you look it over. If there is something special that the family wants it can be added. The obits around here are pretty much the same. Occasionally there will be one that was definitely written by the family as it does not follow the norm.
That explains some things, then. It sounds like the obits are very standard in that area. Where I am from, they are very personal, there is no limit to length. The only thing prohibited is bad language.
We did not publish our address in the obit for the gathering at our house. Instead, we put in the obit, "Friends and family please join us at the Sparksals Family Residence". The line of thinking is people who knew us know the address. Those who knew us but may have forgotten the address had ways to look it up.