I'll admit to something here: It is not unusual for me to send out a "feeler" PM to a gal I see online and whom I am interested in meeting without first checking into her stated availability. My experience is most providers don't do a good job keeping their profiles up to date, and I have had some success seeing gals outside the parameters outlined in their profiles (ie, notice, screening requirements, etc).
I remember reaching out to Samantha once in this manner (it wasn't late at night, but it was short notice). She declined, but was very polite about it. I've always felt like the door was open for me to try again, with a bit more notice. Hopefully, I'll be able to make that happen one day. My read on this is it was just a confluence of factors that caused a negative reaction, not a normal course of dealing on the part of the OP.