If you're getting that strong of an ammonia smell then it's still fermenting pretty actively. I've had the same issue with WLT leaf in the past. I'm not amused by it, either.
One batch of binder leaf from WLT I had to soak it in water, dried it and soaked it again then used a mild spray of wine vinegar then rinsed it again. The leaf I had was binder so it wasn't important that it look good. It worked but it retrospect it was more effort than 21 dollars of leaf was worth to me. If I get another batch of leaf that stinks that badly I'm sending it back to Don.
My leaf was so strong it would stink the entire garage pretty badly, and not unlike a pail of used diapers. I wasn't going to use it until it calmed down and if I couldn't get it to stop stinking I would toss it.
Also if you notice, lots of leaf when damp will smell slightly of ammonia but it shouldn't be overpowering to your senses, nor a problem.