TCL blunder

I saw this in the bus today.

Notice anything wrong?

When we take the bus, we're supposed to get in through the front door, and then get out through one of the doors in the back (just any door other than the front door) The green signs are to tell passengers to move to the back, so that those coming in would have space to do so. However, on the bigger sign, the arrows are pointing in the wrong direction...they're supposed to point to the back of the bus, like on the smaller sign underneath.

Well, it's actually just a simple error of putting the sign on the wrong side of the bus...but still, they could have paid more attention to what they were doing!

Note: TCL is the public transport company in Lyon