Attack Spacing Changed Itself Mid-game

So there I was, right, playing a friendly game of rugby against my mate. The game is going fantastically well. At the 40th minute mark, his subs run on. I decided to play on without subbing myself, or changing strategy. But then, at the next lineout, something strange happened.... on my throw, my backline were now standing so close to each other they were holding hands! My wing, instead of standing on the side line as he was in the first half, was now standing in line with the poles in the middle of the field! That was a strange glitch. But the next lineout they lined up the same way. And the next.

Has this happened to anyone else?
Not as yet and I hope it does not or I am stuffed