I'm so sorry. That just puts a pit in my stomach for you and your daughters. As much as we tell ourselves that their behavior is their own and not a reflection on US, it DOES reflect on us...or at least sloshes on us a bit or something.
When you said that he had to go to the store, I knew right where it was going. How many times have I heard "I need to run to the store", "I'm going to go get some gas", "I need to go do the dump." (at 11:00 at night??? Certainly you can do better than that.)
I agree with anvil. Address it with your daughters and help them work through it. Ugh.