From the Florida Bar News:
A software upgrade on June 20 changed the ways parties are selected for the electronic service system,which is part of the portal when a document is filed.
Before the change, lawyers involved in a case could add parties for the e-service list. Everyone on the list automatically received an emailed copy of the filed document, unless the filing attorney (or the attorney’s staff performing the filing) went through the list to check off parties that would be omitted from getting the document.
Under the new system, automatic service is over. Attorneys must perform an extra step of checking a box that they want all parties served or go through the list and check which parties they want copied with the filed document — similar to what they did with paper filings. (Using the electronic service system is still voluntary and lawyers can continue to serve via email or regular mail.)
Read the full article: E-service change draws questions. For the e-service rules see Fla. R. Jud. Admin. 2.516 Service of Pleadings and Documents.