get (one's) signals crossed

To have a misunderstanding or miscommunication with someone else. I'm sorry I'm late, I thought we were getting here at 8—we must have gotten our signals crossed. My mom and I got our signals crossed, and now there's no one here to babysit the kids.

Common Names:

Name	Pronounced	Usage
Isak	EE-sahk	Swedish, Norwegian, Danish
Mohamed	-	Arabic (Egyptian)
Delfina	-	Italian, Spanish
Marilynn	MER-ə-lin, MER-lin, MAR-ə-lin, MAR-lin	English
Triinu	-	Estonian
Hyacinth	['haiəsinθ]