I bought my 08 RDX 2 weeks ago. Under fairly hard acceleration I will shift from first to second no problem, but as soon as i shift into second is automatically shifts me into third. Is this normal? Has anyone else had this issue? Car is 100% bone stock with 47xxxkm on it.

 

Any idea when the transmission fluid had been flushed? Your best bet might be to try that. If you can do it yourself, flush it, it's not recommended to use a machine at a shop to flush it.