I'd like to ask a couple questions about clear and wire retainers, please help.

Basically normal, and I think your doctor is quite a thoughtful person, clear and plastic retainers together are quite rare. You can usually tolerate 60 degrees while wearing a clear retainer. You feel just right, no pain is not tight is best. But these two keepers, generally difficult to reconcile, back and forth to change wear, certainly wire of difficult to adapt.