Boyfriend still has his ex-wife under his accounts!

My boyfriend and I have been together for 8yrs and we have a 6yr old daughter together. I recently found out that his ex-wife is still under his accounts like Car Insurance, AAA, Cell phone, etc. I got very upset about it, cause I asked him awhile back if he can put me under his car insurance and he made an excuse saying its going to be expensive! So I didn’t bother asking anymore and when I found this out, I was so furious with him. He ends up being mad at me for getting upset with him on this! How would you ladies feel about it? Am I over reacting to this?