Shimano Canti Return Spring

It seems the last time I had my wheels off for a thorough bike cleaning that
I "sprung" the return springs on my cantis. I put a drop of tri-flow on the
brake bosses and then "worked" the levers back and forth a few times to work
the lube in.

When I reinstalled my wheels three out of four of the cantis that would not
spread to release because the springs were not pushing out.

To fix this I just pulled the springs out to retension them to provide
outward force.

Questions - Anyone else have this happen? What did I do wrong? Will
retensioning them like I did cause problems down the road? Did I hurt
anything? They do seem to work ok.

Thanks,
Mish