Hey, just ordered a 2009 Look w Ultegra.

Question: I tested a size small that was 51cm and it fit great. LBS wouldn't negotiate on price so I ordered from an online store. I ordered a size small. Just noticed that the online store lists the small as 53cm and the extra small as 51 (whereas I thought the extra small was 49cm) - see below. Not sure what to do now. Do you think this is a typo or would the online store have a different sizing? I am going to call them tomorrow but getting worried now!!

Geometry
Size
(Virtual)Seat Tube
Top Tube
Head Tube
Standover
Chainstay

Xs
51cm
51cm
12.5cm
29.2"
41cm

Sm
53cm
52.6cm
14.5cm
29.8"
41cm

Md
55cm
54.2cm
16.4cm
30.3"
41cm

Lg
57.5cm
55.8cm
18.5cm
31.2"
41cm