OK you are right, 1910 and 1930 both have Lena living at 2020 Thomas st, and so does this 1920 record, so that was easy, this must be them. :)
Then we have John Jr in 1940 living at 1524 Leavitt st, which you are right, that is the address he was living at in 1946 when he died per his death certificate! Another one done. :)
George Dilcher was such a troublemaker. :) Elizabeth Spohr Dilcher divorced him in the early 1890s, which especially did not help that (if you saw the articles in my special G.H. Dilcher) he had married another woman named Addie Adwein (Davis) on 7/6/1887 while still married to Elizabeth, and given his penchant for schemes and scams it's impossible to know how many times he was legally or illegally married. ;) This record to a Clara Goldenberg that you found on 2/5/1898 looks like a very good fit.