Crambrink

Hello, I am trying to trace a family line and am needing some help. I am not sure if this line is even correct in the first place but I am going to assume for research purposes that is is until proven differently. What I am not sure about is Oscar Bud Brannan marring Mary A. Crambrink but I am finding things on her line that I would like to know if true. Ok, so here goes:

1910 US Census: Oscar Brannan, wife Mary. Mary's birthyear 1888 and birthplace Kansas. Mary's father's birthplace: Wisconsin. Mothers birthplace: Missouri.
https://www.familysearch.org/search/recordDetails/show?uri=https://api.familysearch.org/records/pal:/MM9.1.r/9XWV-DBL/p_514828265

1910 US Census: Henry Crambrink, wife Stella. Henry was born 1861, Wisconsin. Henry's birthplace Wisconsin, fathers birthplace Holland. Mothers birthplace Wisconsin.
https://www.familysearch.org/search/recordDetails/show?uri=https://api.familysearch.org/records/pal:/MM9.1.r/9XWX-31Q/p_514222181

1910 US Census: Stella Crambrink, husband Henry. Stella was born Illinois in 1865. Father and mother both born in Illinois.
https://www.familysearch.org/search/recordDetails/show?uri=https%3A%2F%2Fapi.familysearch.org%2Frecords%2Fpal%3A%2FMM9.1.r%2F9XWX-31Q%2Fp_514222182

NOW THE WEIRD PART I NEED HELP WITH......

1920 US Census: Marvin C. Crambrick, wife STELLA. Marvin was born 1862 in Wisconsin. His father is listed as being born in Holland and his mother New York.
https://www.familysearch.org/search/recordDetails/show?uri=https://api.familysearch.org/records/pal:/MM9.1.r/MD8Q-YP6/p_412688805

Marvin's Stella was born in 1865 and was born in Illinois.
https://www.familysearch.org/search/recordDetails/show?uri=https%3A%2F%2Fapi.familysearch.org%2Frecords%2Fpal%3A%2FMM9.1.r%2FMD8Q-YP6%2Fp_412688806

It appears that Henry and Marvin are brothers and that Stella married both of them at some point?

It also appears that Henry and Marvin's parents were Henry and Mary Crambrick, and Mary remarried later on to a Loomis.

This is from the Pawnee, OK cemetary:
26       CRAMBRINK       Bertha       -       1908       1986       [Chapman Black FH marker]
11       CRAMBRINK       Estella       -       1860       1963       W of Henry
11       CRAMBRINK       Henry       -       1861       1930       H of Estella
26       CRAMBRINK       Ruth       Katherin Dietz       26 June 1901       8 Sept 1933       W of Coin
26       CRAMBRINK       W.       H.       25 Oct 1885       14 Nov 1963       

Estella Crambrink, Wife of Henry 1860-1963
Henry Crambrink, Husband of Estella 1861-1930

So, I am confused where the Mary Crambrink that married Thomas Jefferson Brannan fits in..?

Any ideas?

Thank you,
Joey