It is very likely this was done intentionally. Maybe not all people involved in making this law noticed it, but the person working on article 2 did this intentionally. They explicitly list that this article is always active now:

> (3) Außerhalb des Spannungs- oder Verteidigungsfalls gelten die §§ 3, 8a bis 20b, 25, 32 bis 35, 44 und 45.

https://www.gesetze-im-internet.de/wehrpflg/__2.html