Hi,
I've recovered the map to Dog Parks Recovered, id:d06c39cb7528460f8ce4e4453bf51abf
Please check that your first slide is correctly located as this information was missing, i re-added it by centering the slide over the dog park data.
In order for us to try to understand how this problem happened i'd be grateful if you could answer the following questions: Esri has two free web mapping offerings - the map viewer at arcgis.com and Explorer Online. Did you create the map using Explorer Online and only use this product for editing and viewing your map and presentation? If you used a combination of them both please describe your workflow.
On a separate point I don't think you'll get very good performance from this map given the amount of data that you have imported - it's pushing the application to the limit for imported data. If it's an option for you I would recommend migrating to use ArcGIS Server services instead.
Regards
Mike