I am using Vegas Pro 17, I'm not sure if my events are referenced because all I did was copy and paste attributes with a couple clips.

If some events happen to be referenced, is there a way to check which events are referenced to each other?

If there happens to be a way, will deleting these events and replacing them get rid of the reference?

If these are all video clip events, they should come in as unique events. If they're from the Media Generator section, they could be references. If so, they'll all have the same name.

If they're video clips, are they from unique files, or did you create sub-clips in the trimmer? I haven't keyframed the latter so I wonder if that could be the source of the problem.

If you'd like to share your veg file, I'll be happy to take a look at it to see if I see something jumps out at me. I also have 17 and Sapphire.

When you copied the keyframes, did you then Deselect them. If they are all still selected, then they will move as a group.

I've never had much luck selecting particular track-FX keyframes for copy and paste. But if I save the fx which has the keyframes as a filter pack I find the keyframes save and restore along with the fx. I often do that when I need to copy a track from one project to another, typically between different Vegas versions. It helps to make sure the copied clip is positioned the same on each timeline and make sure project and quantize settings match. It's simpler doing this with clip-fx because when I copy clips, the event-fx, event-pan/crop, and any associated keyframes automatically copy and paste along with the clip... I've been doing that allot lately with a png event I use to watermark downloadable clips that I post. I noticed that not only do all the event things get copied, so does the video track composite-level envelope which saves me a step.

Update:

Keyframes in question seem to behave and stay put now despite moving my clips and adding other keyframes. It fixed itself ever since I posted this forum :/ (I didn't even do anything).

But thank you guys for your help, I learned a lot from your replies!

Answer to michael-harrison's question:

I'm assuming what you mean by video clip events is that I right click on my clips that I put on the timeline and click on video event fx to put my effects. If so, then yes they are video clip events. 

These clips (where the keyframes keep moving) are trims, but they are not trims from the same video file so they are still unique from each other.

Answer to DougT's question:

When I copy the keyframes, I don't select them because all I do is right click on a clip, copy, right click on another clip, paste event attributes, then it will automatically add similar keyframes (effects and position on clip's timeline) from the clip I copied to the clip I pasted event attributes to.

So the keyframes never got selected in the first place (Vegas Pro might have just been buggy when the keyframes would move), but from now on I will always check to see if my keyframes are selected if I ever need to troubleshoot this issue again.

Response to Howard-Vigorita:

Never heard of filter packs before, but I did some research and I might give it a try and make my own custom filter packs. Thank you for the suggestion!