32 is 2^5, i.e., one bit set in base-2.

I don't know that you needed to add any refridgerant. Perhaps it's now too full. You can remove some by chilling a can that isn't full and connecting it to the low-side connector, with the compressor (and engine) off.

A bowl of ice works well for this. Don't remove refridgerant too quickly or you'll also remove oil.