Skype messaging problem

Question

Okay, so I was offline when this message. A friend named Anastasia sent me a message. "Настенка, ты на работе еще?" It just means, "Nastenka, are you at work yet?" So I logged in two weeks later and the message popped up. Настенка was the only word I didn't know so I asked my friend what it meant and she replied, "its my name!!! Where did you see it?!". So I copied the message and showed here that she wrote the message. She told me she didn't have any friends named this and that there's only one person that calls her Nastenka, her boyfriend. I don't know her boyfriend, nor have his account information.
So how could her boyfriend send a message to me, from her account asking her if she was at work yet? Is this a glitch? It's pretty unsettling if Skype can't deliver messages properly.

Answer 1

There is probably a better forum to  put this in other than hardware.  In any case,  since I've used Skype for many years I haven't had any serious messaging problems (other than latency).  I have however learned a few things.  
1.  If Skype is configured to "Allow anyone to send IMs to me".  You can and will get spam from anyone and they don't have to be in your contacts.
2.  Sometimes name are a coincidence,  other times generated based off whatever a program/bot leeched off the internet.  So if there are a lot of references to "Jack and Jill" and your name is Jack you might get contacted by a random person on Skype named Jill trying to get personal info from you.
3.  If you or your friend has never logged onto the machine, some old messages will sync/pop-up randomly to Skype in an effort to "catch up".  This is more prevalent if you run Skype on multiple machines.  Some computers running Skype may have one half of a conversation and the other one may have the other half.
4.  As long as you are logged into Skype you will receive message (Online, Offline, Invisible, etc.).  If someone sent you a message earlier, the IM's will flood in either as soon as you logon or when Skype decides to finally "catch up".
5.  People can be nosey, insecure, or computer illiterate.  If either your friend or her boyfriend had access to her account from his phone or computer (at any time) they may choose to contact everyone on their contact list in order to find/contact their significant other.   If the boyfriend knows your skype name and number 1 is true, he could Skype you from his own account or an alternate account.
Take the above into consideration.  Based off your situation, it doesn't appear to me to be a glitch, but one never knows.