I'm trying to convert my old plays into UK stageplay format after realising they're all in US form, but there's a few things that just don't look right to me. Am I doing something wrong?

I'm trying to convert my old plays into UK stageplay format after realising they're all in US form, but there's a few things that just don't look right to me. When I Google how parenthesis should be formatted in a UK play, nothing really comes up. I'm using WriterDuet and it just looks so random--this capitalised word in brackets hovering in the middle of the page. Also can I still use things like (cont'd) or (o.s) in a UK stageplay? I'm used to writing screenplays so it's throwing me a bit. I added an example so you can see--WriterDuet has formatted it to industry standard but surely this can't be right? It looks a mess! Thanks.

https://preview.redd.it/nlyuwke9jxde1.png?width=772&format=png&auto=webp&s=cdc42a6210f0e910809476654e9aa55138cf8663