False Start reports XP, level, matches and wins from its saved career. Games keep their own progression rules; combined XP is a total, not a shared competitive rank.
Recorded playtime counts active seconds in saved False Start match results. It excludes menus, idle time, unsaved sessions and play that was never recorded. It is not a complete lifetime timer.
A connected game can appear before you finish your first recorded match. Stats refresh when you reopen or refresh your profile. Guest sessions and separate sign-in identities are not merged automatically.