Hey, I found it! It's on page 3 of the listings when I zoom in on the historic area.
It makes sense that bookings have dropped off since you first posted, for a couple of reasons:
1) Newbie boost that Air gives goes away.
2) Your calendar has filled up more, so you can accommodate fewer date ranges (as opposed to when your calendar was wide open).
3) Few people book over 45 days in advance, and your calendar is pretty full up to that point! I don't have a single May booking yet, either, and I doubt most hosts do. Then again, I speak as someone whose peak season starts waning around this time... but the general principle holds.
4) Your listing doesn't have reviews yet, which I'm not sure helps very much with the search algorithm. Once they start coming in and your place is shown to be legit and great (as no doubt it is), you'll get a bump I'm sure.
Now sure why the listing is grey, but I'm thinking it's not a glitch.
One thing I strongly, strongly recommend is to get a professional photographer for your listing (advice I'd give to anyone). Or at the very least, take pics with a high resolution smart phone and dress it up a bit on a photo editing site like PicMonkey. Your place looks great and it could shine even more with better photos.