Should I be concerned?

After having yearly smears because hpv detected last year I was sent for a colposcopy. The dr. said she could see the virus but it wasn't much and I could go back to normal cycle of a smear every 3 years. Admittedly I was a bit concerned but thought this was good news.

Today I received a letter to make another smear appointment. Should I be worried? To be honest I'm happy to go but surprised given what they said last year?