SL Remote is quite old, so I guess you have a reason why you stick to it. On the other hand it might be difficult to find somebody here, who still knows the details and is able to answer your questions. So I recommend to have a look at the download page. It might lead to the information you are looking for: www.presonus.com/products/StudioLive-Remote/downloads.
You should also check the download page of SL 16.0.2. (as one of the legacy products), espcially the release notes of Universal Control 1.7.4. as latest & greatest. It is very important to use matching versions of firmware and software: http://www.presonus.com/products/StudioLive-16.0.2/downloads.
Your question 1 looks like a permission problem. Your device needs the permission "channel rename". Question 2 might have to do with general settings of your board (system menu). There is a function to enable or disable fader/volume levels.