Juvederm Ultra Plus XC lip injections lumps? (photo)

I got Juvéderm injections three weeks ago. Half a syringe. Initially my lips looked amazing and I was excited to get an additional 1/2 syringe put in for full lips. I went to see my injector two weeks after the injections because my lips were still lumpy and bumpy. When I smile you can see the lumps. She told me to keep massaging them and I will go back next week for final assessment. I know I will have to get them dissolved. What caused these lumps? Is it the injectors fault?