Does this sound fishy to You?

So a couple of weeks ago I mentioned that I had won a cash prize from a sweepstakes I entered. It was from a major magazine that gives away hundreds of prizes every month. The prize actually ended up being 5 American Express traveler's checks, which is fine as they spend like cash. The prize envelope arrived Friday afternoon. With only 4 checks in it. Mark took the envelope directly from the UPS driver's hands and I opened it immediately. I double and triple checked the envelope looking for that last check. Not there.
I placed a call immediately to the promotions person from that magazine, as well as sending her an email telling her that a check was missing. I knew she would be gone for the day because of the time difference (she's in New York) but wanted to do it right away anyway. I waited all day Monday never heard from her. Yesterday I called and emailed again and heard back from her with the following email:

Hi Marlene,
I am trying to figure out how that could’ve happened, I mailed all certificates to you unless they were taken out by UPS I will see what we can do.
Thank you,

I replied back that I was willing to give her all the serial numbers, which were consecutive, and maybe AmEx could help with tracing them. I never heard back.
This morning I emailed her again, frustrated with her lack of communication and movement. I let her know that if I didn't hear back today I would contact someone higher up at her magazine and then i would be contacting her state's Attorney General (Sweepstakes are governed by the laws of the state they are conducted in and overseen by the Attorney General's office!). The email i got back from her was this:

We will be sending you another American express gift certificate this week via UPS, you will most likely receive it by Monday or Tuesday. However, please note that our financial offices are tracking the numbers of the 5 certificates that were sent to you. We will check on them when they are spent and we will let you know who spent them.

Maybe I am being sensitive, but to me it sounds like she is insinuating that I am lying. Mark thinks that she had something to do with the missing certificate and is trying to cover her butt. But her email made me feel like I did something wrong even though I know I didn't!

What is your opinion???