I'm getting to be an expert on reading bloodwork because of what I'm going thru with Warlock, and Harley's bloodwork looks OK. The creatinine/Bun is slightly above normal and that can be because it's normal for him, or stress from being at the vet, or his thyroid.
It's hard to get a good platelet count when they clump on the side of the tube, and as long as he's not bruising easily it shouldn't be anything to worry about.
Personally, I'd do a reject in a couple months unless he has symptoms you're concerned about.
Hatter is hypothyroid and when his levels are off he has seizures, similar to what you described, and his creatinine/bun ratio is elevated, and actually his have gotten higher than Harley's numbers, but he does not have kidney disease. I'd be more inclined to run a full thyroid panel to see if his meds need to be adjusted or if you've just recently started the meds, give them a little time to work and then recheck in 2 or 3 months. Of, course if he has another episode I'd definitely run a full thyroid panel sooner, than later.
Hope that helps a little and puts your mind at ease.