Last modified: 2013-10-01 19:58:05 UTC
1)Log into http://en.wikipedia.beta.wmflabs.org 2)Go to your user page 3)Click on Edit beta tab 4)Click on More 5)Click Media 6)Enter santa claus, select a image from the selection of images 7)Select the image(the image is displayed in light blue) 8)Again click on More, then Media and select another image. Expected:The original/old image should be replaced by the new image. Observed: The new image is added and the original image is also displayed. Another observation: Also, suppose there are 4 images Image1, Image2, Image3, Image4 one below the other. If Image2 is selected and I try to replace it with a new image, the new image appears in the place of Image3(instead of Image2). Observed on Firefox and Chrome.
I can confirm this is the current behaviour, and that both points are due to the same reason: new images are inserted immediately after a selected image. However I'm not sure that this behaviour is incorrect though as it is consistent with what happens when a user inserts media or a template with text selected (the template/media is inserted after the selection rather than overwriting it) - see bug 52460. There is an open request for the media settings dialog to allow an image to be easily changed though (bug 51033), which I think is a better way to handle this.
Yes, confirming that this is intentional; closing as "WONTFIX". I agree that changing in line with bug 51033 would make more sense.