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
Galahad	GAL-ə-had (English)	Arthurian Romance
Willabert	-	Ancient Germanic
Lovisa	loo-VEE-sah	Swedish
Anzor	-	Georgian, Chechen
CorraidhÍN	-	Ancient Irish
Leonardo	le-o-NAHR-do (Italian, Spanish), lee-ə-NAHR-do (English)	Italian, Spanish, Portuguese, History