"Also surenames. I have a Ruzicka surname in my tree for a female. WRONG! Ruzicka is the male version of the name Ruzickova is the female version."
the - ova was not always taken - i also have a ggggrandmother which had the name Ruzicka not Ruzickova. she was the mother of my gggrandmother from Medlice in Moravia (Czech Republic).
also had female cousins of my grandmother who
immigrated to USA before 100 years. the one stated at arriving her name as Skaryd, the other as Skarydova. both was usual that time.

"I assumed my grandparents were born in Czechoslovakia because I googled and found thier birth place. So I assumed (again) that they were Czech. WRONG! The town where they were born was THEN in Austria."
what was the lastname of your grandparents and the town they came from?
Bohemia and Moravia (now Czech Republic) were austrian crownlands that time, but if they had czech names , so also were from czech orgin. or did they have german lastnames, so they were germans (Sudeten-germans)?