Truschinsky frustration

I totally understand that one will inevitably hit roadblocks in genealogy research, but this is a bit crazy. I waited three months to get the information on my great grandfather, August Truschinsky, and after I finally get it, I run into a new roadblock in less than one day! UGH!!! August was born, according to his death record, in Salisburg. This town is now called Mazsalaca. There is no record of his birth in that location. So, I look in surrounding locations and then I do find his birth record. The birth record gives the names of his parents and they are the same as another I found in Truschinsky birth record for a town called at that time Alt Salis (but is now called Salacgriva). I had found the father's death record in Alt Salis a few days earlier and it indicated a birth location in Kurland -Aswiken. This community is now called Aizviki. I searched in the records in nearby, slightly larger towns and, thus far, there are no records. Another person who either died or got married listed their birth location as Diensdorf in Kurland. That community is now called Dinsdurbe. No such luck in my search there, either. What is interesting is that this family has four different communities in which they lived or were born. I still haven't found two supposed brothers in this family, but I did find an unknown female named Olga -though I have not confirmed a relationship.

*sigh* the search goes on...