Check your Craigslist ad by searching for it without logging into your CL account. I found mine weren't showing up a few weeks ago, even though I could find them through my CL account link. No idea why, but I reset the ads and they started appearing in the listings.
You were right! One ad was not there at all. The other was there along with quite a few similar ads with prices all over the place. I'm priced low. Once I went 6 months waiting for a qualified tenant. My motto is no tenant is better than a bad tenant.
This was happening to me as well. It was a total PITA to find a way around it. Bottom line is that you need to search for your ad after posting on CL as you would otherwise never know if your ad was ghosted.