I was thinking the same thing... as long as I'm in the sixties, I'm not worried. I ordered the really big pack (60g) instead of having like 3 smaller ones in each jar of the 8 or 10g (forget exactly, but the second largest size).Wow, that's a real jungle on Long Island High humidity is tough cuz burping needs to be in the right direction. If your house and case are both 62%, then burping should still work, albeit slower acting which is fine too. If I'm burping with house humidity of 40%, RH would drop much faster.
IMO, 66 and 68 are close enough to the target of 62% that you should be fine as you slowly zero in.
You should be well below the mold danger zone --- the danger of too high humidity. I believe most cigar humidors target is 72% so you're at least below that.
I guess the test will be in a month or so. I cannot tell you how much I appreciate the time and direction here. Nothing worse than wasting time (or herb)!