Well it's only if it bothers you that you may want to look at changing it. Yes, it probably has started to impact on how your lo's routine is - especially if you were driving in the car while she was sleeping etc. Long-term you probably do want to try and get her used to a home routine as well so you're not having to rely on going out to have a good day. When she goes onto 2 naps a day you may find it more difficult to be out all day and her also have a good day. If you are the type to be out, well you probably just need to realise that that's the way your lo will expect it to be and you may need to work harder on her routine when at home - so a lot of pu/pd may be needed. Its your call really.
What specifically is throwing the routine out? Is it something you want to fix?