since you are using Electrum the default setting on it is to use a change address, you can change this in the settings. in toolbar click on tools > Preferences > {in the first tab called} Transactions > uncheck Use Change Addresses
but you will have to choose a change address to send the remainder to manually after doing this.
thank you, yes there is a "change" category under the addresses, where i can find that address...
in your addresses tab there is a category called change and I think you have already found that.
to spend from that address you can right click on it and then if I am not mistaken there should be a send from option.
edit I was right you should be using version 2+ so it is has the feature.