I thought you must get tired of reading peoples threads so I decided to submit a video response instead.
https://youtu.be/YfQk-BeY98g

EssentialsX version (/essentials):
2.0.1-b488
Server software (/version):
Latest 1.7.10/1.8 paperspigot
EssentialsX config (if applicable):

When I add xp using the following command /xp set 1000 (I had 0 xp prior to adding the xp) It displays that I have 1700 instead of 1000.
https://i.imgur.com/g4CoNEt.png

Please write out the issue in addition to the video, as it's much less convenient to follow a link and watch a video (even if it helps in some cases).

Edit: didn't intend to close this.

@md678685 What do you think is causing this issue?

I'm not sure at the moment, but I suspect this is intentional and is related to the 1.8+ experience calculations.

@md678685 Are you able to fix it?

@md678685

I haven't had a chance to look at the experience code, so I don't have an update on this yet. If someone else is interested in this, feel free to look into it.

A server I am currently working for is also experiencing this issue. It seems like a calculations issue, and should be fixable with some math adjustments based on version number, assuming it isn't neccesary to maintain the odd calculation shifting. Can you update on your efforts to fix it, or explain why it's needed, @md678685?

You are running PaperSpigot 1.7.10; it is not compatible with the EssentialsX and hasn't been for the past 2 years. The way that experience was calculated changed between 1.7.10 and 1.8, see: 3634cab.

If you want EssentialsX to work correctly on 1.7.10, you will need to use 2.0.1-b304 or before, or update your PaperSpigot.