Hard to tell what's causing the alignment problems for you, as it could be any number of things. Do you have an alignment result printout to post? Numbers would help make sense of what you are facing. Did your shop just say 'All's Well' or did they provide results? Did you witness the alignment check and adjustment?
Also, are you aware of the rear axle alignment problems these cars have?
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View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)