Sorry @Jennifer1421 - just seeing this now (I don't receive notifications when anyone tags me)
Yes, this sounds all too familiar!! (except my listing often can't be found even with the dates entered). My listings disappearing off the face of the earth, has been the bane of my life for years now - happens at least once a month (and every single time there's a platform update) Other times (like just last week), the system relocates me miles down the road, or to the other side of the city, and it frequently scrambles my address.
I did believe at one point that it was related to the geocode, but thats been checked out thoroughly, and reset several times, and it makes no difference whatsoever. I wish I could be of more help, but all I can say is, this sounds more like a one-off issue that you're experiencing right now (hopefully!), rather than the recurring nightmare I have on my account. I hope it gets sorted out quickly for you, because its a very costly, very time-consuming and very stressful thing to be dealing with.