If someone has prescribed / supplied you with a Functional foot orthosis (FFO) / insole, then I have to assume they have done a full biomechanical assesment... and are properly trained to do so?
In which case I am 99% sure you should be wearing neutral footwear. Orthotics only take the foot and the foot's alignment into consideration.... they do not account for the shaping of specific footwear.
To wear anti-pronatory insoles AND anti-pronatory footwear... your insoles would not only have to be designed around your foot but also your footwear... which is only the case in about 1% of people, (people with lots of money for lots of private treatment!)
As an orthotist, I am obviously bias here, however as far as being assessed by a podiatrist for ORTHOTICS goes... This concerns me. Perhaps, seek out an orthotist through visiting your GP. Orthotist are specifically trained in such biomechanics. In my experience, podiatrists DO try their best and DO mean well, BUT...!!?