Bonding re-done after Invisalign treatment? (Photo)

I recently finished Invisalign treatment and had the bonding on my front right tooth replaced and bonding on my incisors removed and reshaped. My question involves two parts: 1. My dentist said I wouldn’t need a new retainer tray made after fixing the bonding. I want a second opinion. 2 . My dentist never gave me a retainer tray after my Invisalign treatment and I am still using the last tray in the treatment set. Is this typical? Should I be getting a new tray for my post treatment retainer?