I just switched to Electrum, and sent my first transaction from it.
I tried to set the mining fee manually, but whether I set the "Use dynamic fees" in the preferences on or off, Electrum still tacked on an additional 9 satoshis to the static mining fee I set.
Not that it's a great amount, but why doesn't it use the static fee I set, and instead adds more to it?
I tested and wasn't able to reproduce this on 2.8.2 . You aren't using a very old version of Electrum, are you?
Settings tested were
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FqSmA33v.png&t=665&c=r48k-HffyFdQig)
I was able to successfully enter a manual fee and when previewing the transaction, it used exactly what I typed as the fee.
How are you reproducing this issue?