Ok, thanks for the update on your situation!
As for the ammo issue, I am unsure what you mean with deleting the ammo request with hotkeys. I don't have a visible request for it anywhere I know of and I don't see a hotkey for disabling a default ammo crafting.
Hold the ammo and press HandyHands decrease hotkey (default J) until the setting is removed ( happens when you try to set craft request amount below 0). Hold nothing and default crafting limits are changed, default below 0 will remove all crafting limit settings. Read mod description for more details or ask again. If the mod description page is unclear then if there's something specific I can improve I'll try to do that :)
Any time rapid changes happen it's almost like all the triggers are causing Handy Hands to want to recheck everything with every item I receive from a bot and every time it crafts something.
There's a timer that limits how often the checks are performed, but they are shorter (which means the checks will run more often) than before. I thought that since it wasn't going to check all the time for all players I could shorten the timers down a bit without really affecting performance since it is unlikely that all players trigger the checks at the same time anyways. But I probably made the timers too short. That should be easy to fix.
The purpose of the timers is to NOT do a full check for every triggering event, but instead do it once every Nth tick (similar to how it was before). The difference is that the Nth tick timers don't run at all (which means the mod is completely idle) if inventory (and other things) haven't changed which would mean that a retry to find something to craft will fail again. So if I just set the timer values to the previous ones then that should resolve the performance issues.