Yes, you can post to more than one group at the same time! Once you have your items on your Listings page, you are able to post those items to as many groups and Parties as you would like.
Posting to another Facebook group from Listings:
If your items are already posted to one group, go to your Listings page.
Scroll down and make sure you select and highlight the items you want to post. Scroll down and click Post Selected to Facebook.
Post to another group on Facebook using SmartPost:
If you would like to post all of items in your Listings, you can use the SmartPost feature. On your Listings page, choose the SmartPost tab.
You will be taken to a screen to select your group and then the system will either SmartMatch your albums, or you can create new albums to post to.
Posting to a Sonlet Party from Manual Listings:
If your items are already posted in a Facebook group or another Sonlet Party, go to your Listings page, under the Manual tab. Scroll down and make sure you select and highlight the items you want to post. Then scroll down and click Add Selected to Parties.
You will be given the option to select which Party you would like to add to. Select and confirm.
Posting to a Sonlet Party from Manage Albums:
If you would like to post all of the items in your Listings, you can use the Manage Albums tab on your Parties page. Go to your Parties page, select the Menu button to the left of the Party name you would like to add to, and click Manage Items.
You can then go through and click all the sizes and styles you would like to add to the Party.
There is a helpful tutorial video here: