Hello Larry -
If you have listed your items using the appropriate catalog entry and are still receiving API warnings from eBay it would assist us if we could have a look directly at a few of the items involved to ensure that the data is being sent to eBay correctly or to see if there is a difficulty on the eBay side.
Please feel free to file a support case from under the Help tab of the site letting us know the details of this issue and include the title or item number of a few items where this has occurred so we can look into it further.
- Craig