I think we all need to keep in mind that on the internet, no one can hear the inflection in your voice. Something you intend to be polite can be easily misconstrued as being rude or defensive, and can set off a chain reaction, or a flame war. Believe me when I tell you, this is the single most polite and levelheaded forum I have ever seen, so if you are illiciting what you perceive as a harsh reaction, you should reexamine the tenor of your posts, and see where your intentions may have been misunderstood.
...it isn't about winning here. It's simply about trying to clarify the rules. You didn't know what they were, and to you, it seemed like a foolish rule. Fair enough. Others have explained that they think it is not a foolish rule, and have gone so far as to explain how severe the penalty might be for breaking it. No one was attacking you, just saying hey, you can't do that, you can get your sanction card revoked. To further explain the severity, Erin mentioned that, if she were in the position of your league secretary, she would have started the process already....it's considered that serious. Take that for what it is, and move forward.
As for your league secretary, from the way you phrased your question ("wondering if she's harassing me), think of it this way....you now know what the rule is. You also know how serious the penalty is. Her coming to you, telling that you are not to switch, and that they are going to be watching to make sure you don't switch, was the exact opposite of harassment....she was cutting you a break. That's how I see it, anyway.