1 Cor 10:31,

Thanks for your prayers about Pastor Bob!

Regarding your demon question, I believe they could take objects from your home.  What they call poltergeists throw objects around rooms, so seems like they could take things away.

I found this list of ideas where open doors could come from:
https://www.awesomechurch.com/open-doors-to-curses-and-demonic-intrusion/
(I don't know anything about this church though)

You might try curse breaking.  Here's an example
https://wildatheart.org/prayer/prayer-breaking-curses
(I don't know anything about this site though)

I will pray for you!
Kat Kanning