Undesired initial displacement?

Hi colleges,

I'm working with a movement of a part, using the next Expression: `STEP5(TIME,0,0,0.1,80)+STEP5(TIME,0.2,80,0.3,0)`

And the part, at the start has a initial displacement of 80mm:

I don't understand where comes this initial displacement, any mistake in the Expression?

I attached the complet file.

Thanks!