I'm having a similar problem. Last night I promoted 7 new listings (all via desktop computer, as always)... and today's "Manage Active Listings" page still tells me the group of items is flagged as "Promoted Listings - Eligible"... but when I try to do that... there are no available items to promote. GRRRRRR!! I finally went ahead and cancelled one of my two campaigns... just to see if I could let them clear and start a new campaign.
Once I cancelled the campaign, the system asked if I wanted a report on that campaign. After reviewing the data in the report (approx 200 listings)... I found that the system had entirely dropped the title and most other misc information from approx. half of the report. In essence, there is no way to track what was being promoted! (no wonder sales are down!!)
Bottom line... after waiting for an extended period for the eBay servers to "cycle" and clear the old campaign... now I'm stuck. It says that my entire inventory (496 items) has been promoted... even though half of those items were in the campaign that was cancelled in an attempt to clear the problem. Until that information is cleared... there is no way to launch a new campaign to cover those items.
I've been managing "promoted listings" (aka "advertising dashboard) for several years... and have never seen anything like this. Doesn't seem to be any valid excuse as to why eBay is still silent on this issue. I won't even attempt to contact Customer Support. The decline in service over the past month has rendered the service as worthless. They now transfer 100% of my inquiries to offshore personnel who have far less experience than I have... and are extremely difficult to understand with such heavy foreign accents. (performance grade: ZERO!). Clearly, English is not their first language and yet they're the best that eBay now offers. At this point... I just have to approach eBay as if they no longer offer Customer Support.
