Both the 1925 entry at NY and the 1928 entry at Vermont are the same Evelyn Korim Finn. The quick trip to Canada was apparently necessary to regularize her immigration status.
Evelyn came in 1925 as a student at the Horblet Prep School in Roxbury, indicating a stay of 3 years, an intention to return to her country of origin, and no intention to become a citizen. Her visa was issued at Kovno on March 3 1925 and must have been a student visa only. Remember that the Immigration Act of 1924 had instituted national origins quotas, so if Evelyn wanted to marry William without needing to wait for years in Lithuania, a student visa was the way to do it. Evelyn and William married within a month of her arrival.
Both the 1925 NY manifest and the 1928 Vermont entry document have annotations indicating the details of her status and previous entry. In support of Evelyn’s application for re-entry, William indicated that Evelyn did attend the school while they were married.
By the time Evelyn made the trip to Montreal, William had already naturalized.
William Finn
This is the story of my father's mother's immigration:
My grandmother, Evelyn (Eva) (Chava) Korim, grew up in Debeik, Lithuania, a small shtetl. Her intended, my grandfather, William (Vulf) Finn immigrated to Boston to be with his siblings, around 1920. His oldest sibling was 20 years his senior and many had already immigrated. Two of his siblings who never immigrated perished in the Shoah. It took Vulf 2 years to secure an immigration visa for Eva with the help of a local attorney, she was able to secure a student visa. Upon arrival at Ellis Island she was detained and then released. The two immediately married, a year later my father was born. Alas, the student visa was only good for 3 years and she had to leave the country to get an immigration visa. She traveled to Canada (apparently leaving her toddler son, my father. behind) and successfully re-entered the US with an appropriate visa through Vermont. The date of birth of my uncle Harold, her second child, reveals that she was pregnant in her first trimester upon her second immigration. She never left the US for the rest of her life. Vulf was an ardent zionist, and wanted to make Aliyah. He bought a share in a Moshav. Eva would not go. Therefore, he gave his share as a wedding present to a niece or nephew, whose descendents still operate the property.