The development team does its best to limit the "rubber band" time but since we are not in control of when the server actually processes the time of command we cannot say it will be exact. I go through this issue quite frequently. I never send nobles/trains or any non-farming activity on mobile. I use it mainly for alerts and building troops while away. Mobile is really not meant to replace browser version, it is meant to supplement it.
Hope this helps making the mobile version a better option when playing.
Thank you for your comments!