The registration period for former National Football League players seeking their piece of the $1 billion settlement fund for concussion-related claims ended two weeks ago, but since then the litigation has only intensified.

Over the past month, the U.S. District Court for the Eastern District of Pennsylvania has seen a flurry of filings related to several disputes, challenging deadlines, questioning the administration of the claims and raising new discovery disputes.

Although attorneys disagreed whether the number of issues surfacing is out of the ordinary, class action lawyers agreed that, given the stakes and the players, these disputes were bound to arise.