I've shuffled things around, moving my files to another directory. Now when I click Show History, I only see the branch that I moved the files in. I'm using eclipse neon, latest version of the mercuraleclipse plugin.
Here are the changes I made. There are old projects that have the source (.java) files in the top-level. So I created a src directory and used hg move to move the files under src. Once I did this, when I click on a file to see the history, It only shows the one change in the new mercurial branch I made the change in.
First thing that comes to mind is which version of MercurialEclipse are you using?
I'm asking because I have solved this very issue a few months ago in the official MercurialEclipse repository. The fix required also making a small change to the library that hgE uses, namely javahg.
Also, maybe that it'll help to have this in your .hgrc file (this file is in C:\Users\theUserName on my Windows 8.1 system. Please, refer to the Mercurial documentation for other systems)
[defaults]
log = -f
addremove = --similarity 100
commit = -A
I'm not sure that log = -f is pertinent to this issue but I have these lines in my file. I can't believe I didn't comment each of these so as to know why each is necessary or useful. Since the fix on August 31, commit = -A is no longer necessary , but I keep it in the file just in case I use hg on the command line.
As a rule of thumb, you may also check directly on the command line whether any problem you encounter with hgE also shows up with hg. That will provide the team as a whole with some useful insight.
Make sure that you use a build of hgE from after that date. If you still have this problem later on, please open an issue on the BitBucket tracker with as many details as possible. I'll fix the problem and we'll update this question with the solution/answer.