It's not wrong per se, but most can fly better with two clipped wings than with just one. The smaller the bird, the harder it is to keep on the ground from what I gather. I only have big LF girls, and they've never even attempted to clear my fence.
Part of the rationale of clipping just one is that it throws off their balance when they try to fly. Clip two, and they're balanced again.
If the real concern is her not coming home when she ranges, start her out by letting her out for an hour or two before bed. Their instincts tell them to go back home at bed. As she gets to know the lay of the land, let her out earlier in the day.