Fuelly partial fillup mpg glitch?

[JCPP]

I have been using Acar for years. I just synced it with Fuelly, and while Acar shows the correct mpg, Fuelly shows incorrect mpg wherever I had a partial fillup. Instead of using all of the miles since the last fillup, Fuelly is using only the miles traveled since the partial fillup, but using all of the fuel since the last fillup. This of course results in greatly reduced mpg figures.

Does anyone here know why this is happening? Or how to fix it?

Thanks, JC

[EMY92]

I just checked your Fuelly profile for your van, the calculations look correct and match what is showing when I logged into your account with aCar. Everything shows 13-14 MPG.