@Hai-Etlik - that is correct.

Another one of these technically incorrect sayings that I have even seen around here is:

"This software has a steep learning curve". If you ever looked at a graph you would understand that a steep curve means you can learn it very fast whereas a gradual curve would mean it takes forever. For some reason however, "A steep learning curve" today, means a thing is rather hard to master and will take a long time.

It's not a huge deal but let's be honest, it's not an accurate description of what we are trying to convey.

A couple more crazy things that catch in my mind when I hear them:

Irregardless - that one should be just "regardless".
I could care less - should be "I couldn't care less" because if you could care less that means you have a measure of care. Probably the exact opposite of what you mean. I suppose there are times that is exactly what you mean because you are trying to trick someone into thinking you don't really care.

Oh well, it's the beauty and the bane of a living language I guess.