The increase in measurements is likely due to increased glycogen storage in your muscles. If it disappears during SD, then you'll know. Start eating more. There isn't much point in lifting if you aren't going to follow an adequate diet.
I would prefer to not repeat the 5s. Either stick with your 5 RMs for two more weeks or progress from there and drop reps down to 3 as necessary so that you can continue to progress. Of course if you are going to continue to eat like a sparrow then I would recommend against this plan as you need an excess of calories to lift in that fashion and not risk an injury. So either up your calories now and do as you plan for the next couple of weeks or else just find your new maxes, start your SD and get a diet plan in order before starting your next cycle.
Squat - 485 lbs
Bench - 315 lbs
Deadlift - 635 lbs
Total - 1435 lbs