I agree with Albert - I can't really understand it that way it is.

The sentence could be clearer. Here's a more straightforward version to express that the request after 17:30 will be processed starting on February 12: "Requests made after 17:30 (for example, at 19:30 on Monday, February 10) will be processed starting from 9:00 on February 12, with delivery by 9:00 on Thursday, February 13." This makes it clear that the processing of requests begins on February 12.

Yes, it seems so.