Nah it's fine I'm so anal about that tbh. I post consecutively ALL the time (not deliberately) and sometimes you have to when you're on mobile. It's not that serious UNLESS it's intentional, disruptive spam.
Sidenote: I hate when the "last edited" thingy shows up so usually I delete the post and post it again with the stuff I want to add, it's so unnecessary but
On the other hand, I love multi-quoting - it makes my posts look more aesthetically pleasing imo.