1. The church registers for mid-1800s St. Nikolai Ev. Church in Stettin say St. Nikolai-Johannes. There was also existing at this time a St. Johannes Roman Catholic Church in Stettin. Were these churches combined at one time?

2. A St. Nikolai baptismal register for 1810-1817 has a note "Pastoren Von St. Jakobi". What was the relationship between St. Jakobi and St. Nikolai evangelical churches or did they just share clergy.

I am researching in the Stettin church books and getting confused because family seem to move continually from church to church. Does anyone have answers or have any advice where I can find more historical info on the churches of Stettin? Thanks.
Veronica