[OSM-newbies] Deleting ways

[James Ewen]

I'm having trouble deleting ways.

http://www.openstreetmap.org/browse/way/25955874

I am in the process of adding more roadways to the Millwoods
neighborhood in Edmonton using Potlatch, and part of what I need to
to, is pull up the old "main roads" that were hastily drawn in the
past, and replace them with more accurate renditions. I can go in and
select points on the ways, and press the delete key to remove them, in
the process stripping up the roadway. However, the road will reappear
again and again. I have pulled up the old roadway pointed to above 5
times now, and it keeps coming back. I have had this issue in the
past, and after a number of attempts, the roads finally go away. This
time, this road is being very persnickety.

What am I doing wrong?

James