nah, you're communicating just fine! The tumors I was mentioning aren't the same as the melanomas you're talking about, and they usually make mares have "stallion like" behavior, so probably not that. The melanomas might be something to worry about, but probably wouldn't really explain the signs you're seeing either. A mystery... I hope she's just having an off day or something.
I guess one explaination (which will get me laughed at here and shunned by my fellow vet students) is that there is a full moon. Weird I know... but we had a client who's dog had seizures on the full moon which we didn't discover until there was a blue moon and he had a HUGE seizure. After that we went back and looked at the dates of all his previous seizures and they were all on full moons.... you just never know! Hopefully she's feeling better soon. BTW my boy has been extra lovely lately too... very strange and unlike him, several gals at the barn have mentioned it to me this week.
I won a foaling contest once (picking time born and gender) by the moon