commenting and scrolling

Since the latest update whenever I try to comment, it automatically selects the first penstroke I've made. For example, if I write 25, it automatically selects the 2 and puts a blue box around it. Can I get it to stop doing this? I'm tired of having to click "undo" or "deselect all."

Also, am I able to change the settings so it allows me to "enable scrolling" all the time or do I have to click this every time I open a new document?

Thanks!

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