Sounds like you have fixed it by tightening the stem. I've stopped a few leaks over the years by doing that. Think it's code to have a shut off at the toilet.
Thanks, yes it's stopped.
It sounds like you're uncomfortable with using the toilet shutoff valve too much. Does doing so increase chances of failure? The only time i use it is to change something in the toilet (i.e. replace flapper, or replace ball and cock with Fluidmaster float mechanism).
In the future, is it better just to shut off entire house? Thanks.