Olimexino 328 upload problem
It is odd that they are using 57600 baud since it has a 16MHz crystal.  Have you tried treating the board as a uno and uploading at 115200?

Also note the two FAQs at the bottom of their web site, the second seems especially relevant. From https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-328/open-source-hardware

I can't upload my code via Arduino IDE. Where is the problem?
The board is recognized as Arduino DueMilanove /w ATmega328 in Arduino IDE.

Make sure you have selected exactly that. Also check which port the board uses
and adjust it in Tools-&gt;Serial.

I do everything as supposed but when I try to upload code via the USB I receive the
following error: "avrdude: stk500_getsync(): not in sync: resp=0x00". What is wrong?

It is very likely that your OLIMEXINO-328 would work as expected if you install FTDI
drivers that are NOT newer than 2.08.14. There is good chance you are using the latest
FTDI at the moment. The whole problem is explained in details in this forum post: FTDI
bug in FT232R with week code 1213