It’s ok to double post, my son.
I prefer not to if I can help it, unless I last posted quite some time ago, or if the first post is already very long. It's just a personal preference on my part, and I don't judge people for double-posting hours later. I do, however, frown on "And another thing!" comments that come within a few minutes of the previous post, which are ugly and clutter up threads, and really wish that the people here who do that would just edit their post instead. Anyway: