Perhaps I am not doing the search correctly (for the voter registration), but the last time I see both of the Gibney's living on Lisbon is 1930. Josephine is again mentioned in 1938. (Nothing for either between 1930 and 1938.)
There is a Thomas J. mentioned after 1930, but he is at a different address (no mention of Josephine) and he was a carpenter.
In 1930: Thomas J., Carpenter (on 3rd), Republican; Thomas, Stonecutter (on Lisbon), Republican.
1935: Thomas J., Carpenter (now living on Bryant), now a Democrat.
1939: Thomas J., Carpenter (now living on Fulton), Democrat.
Perhaps your Thomas did pass away in 1933? Just mentioned the other Thomas in case Thomas and Josephine split up in 1930. I wouldn't think he could be mentioned twice, though, in 1930.