Free Tools to Schedule Facebook Posts Like TweetDeck

I am having the same problem and believe that Facebook is treating scheduled photos as API photos. I found a clue here: hootsuite, which says:

Hello,

Facebook's API regarding photos posted from 3rd party clients is time specific. For instance, if you post one picture during a day, it will show up on your wall. If you post three within an hour, all three photos will be grouped together under one wall post.

Thank you :)
Chris, Support Captain
Enterprise Support
January 24, 2012 11:10

I'm going to try scheduling 2 photos and 1 link to see what happens.

The Google+ API is read only at the moment. Google is working with select partners to provide the Page API which allows writing to the page. You may be able to work with one of these partners (see http://www.google.com/+/business/3rdpartytools.html) to get what you need.

You can also request access to this API at https://developers.google.com/+/api/pages-signup, however there is no indication when, or even if, they would grant you access if you apply for it using this page.