This is pretty much the same situation that I'm in now. Applied to both, and heard from WDW first. I sent both DLR and WDW a email, but haven't heard back yet. If I don't by Monday afternoon I'll try giving a call.
(although, my situation is more dire, I have to reply back to WDW this coming Wed.)
I have heard though, (if you don't hear from DLR in time) that you can accept the WDW offer, eat the $100 fee, wait until DLR reply's...then depending on that outcome call WDW and explain the situation and asked to drop out. The worse that can happen is that you don't get the $100 refunded. I don't know, it's a lot to think about.
If I find anything out, I'll let you know.