I roughly calculate her having at least 1365 days of physical presence when she left for the US (1095 at application in Feb 2013 plus 7 months @ circa 30 days/month to Sep 2013). Her 5 year RO window has used up some of the 'In Canada' days she used for her citizenship application as its rolled into Aug 2015 but the 7 months she lived in Canada after her citizenship application more than compensates for this. She has a significant buffer on the RO. She has a 2 year conditional GC valid to Oct 2015.
