Hello @hatchetjack77 , The reproduction steps category is for you to create a numbered list like this:
1) Pick up a crossbow
2) Shoot it at an infected
3) Observe sometimes it doesn't hurt them
So that the testers and developers can quickly and efficiently reproduce your problem and fix it.
The expected result is for you to be able to say what you expected to happen instead of what did happen to you. For this report specifically, you would say "I expected the crossbow bolts to kill infected everytime they hit them."
For your other bug; the "ghost items" it would have been better to make a seperate report; doing the same thing in those sections I described for you. It will help you get your problem fixed faster.
Sometimes, the servers you play on can have weird configurations, which are technically mods, that can modify your game experience. There is a chance that if you are playing on a community server; this could be the case, even if the server is not advertised as being modded.
What this sounds like though; it sounds like a frequent desync problem. If you and your friend are both experiencing it; it is likely something to do with the server you guys are playing. If the server does not have a fast enough internet connection, it could be "desyncing" with your games, and so these two issues you described would be happening quite a bit; to be noticable. I have seen the ghost items bug before, usually it bugs your hands as well. It's generally caused by desync, but it doesn't happen often enough for me to be concerned about it. If it is happening to you often, and this other thing with the crossbow bolts, its probably desync.
Does it happen to you both about the same number of times (frequency)? Does it happen to you guys around or at the same time?