Hi Mr Warren,
It seems the leak was just about the right amount, not to cause replacement of the flooring. The warping of the planks in the way it appears, talks about "slow drying" of trapped amount of moisture. Trapped below the flooring, moisture can take months to dry out completely. I would expect the look of the floors to change by January, taking in account the coming season and that heating will be switched on at some point.
The floor restoration should have not been used as a solution so soon after the leak and my advise is to leave the floors as they are for another 2 months and then proceed with sanding, if you feel so. There is a chance the planks will go down flat, to same stage as after the restoration.
Another piece of advice - keep good air circulation in the property during the colder periods when heating is on - do not allow drying of the air too much or having the heating on at all times.