It is not unusual (at least on some fields) seeing specific questions about grammar. It must be checked and maybe fixed, and in some extreme cases it can even imply rejection independently of content, but in most cases a revision is enough.
Oh, by field I meant it as a field in a record, not an area of study. For example in some reports I had to check a box for unambiguous text but I had no check box for grammar or spelling. That's some ambiguous text from my part! :)
Your text was fine! I understood what you mean. I have seen the specific box about grammar in some journals. But my field is not computer science or physics, so my experience may be quite different from most people here.