First time ever that I've had that happen to me.

If I were visiting Tysons and Rockville, I would post on DC and MD boards and have my schedule in the body of my ad, with dates for Tysons in the title on the DC ad and dates for Rockville in the title on the MD ad.

and is afraid to post ads which dare to mention a MoCo location??? LOL!!!

post about Dulles,

Moved within 2 minutes of posting from wdc ads to md ads.

Rockville is a city located in the central region of Montgomery County, Maryland.  
So most likely some other provider reported it to the mods, and they just looked it up and moved. You know how it works with backstabbing.....

You can post another ad for Dullas in the DC section. That's not a violation of there rules.

I wouldn't worry about it, as someone stated above, you can still post for Tysons on the DC Ad Board and it's not a violation of the rules (as confusing as they are lol!). Look at it this way, now you have twice the exposure for the same general area

Rockville is MUCH closer (15 miles closer) to DC than Dulles Airport.  Dulles is 18 miles from the DC line; Rockville is about 3 miles across Bethesda to the DC line.  WTF