Just now I edited an answer and got four points instead of two.
I checked Suggested edit gained 4 reputation points, but I already had a few other suggested edits approved, and it has always been two points...
Here is the question:
Is this a bug?
Checking the revisions, I can see two revisions, both at same time and the content is also the same. Links are also identical. Possibly this is the cause of the issue I feel: