Sorry?
If you use OCS=11.0592Mhz then:
- switch global X2=1 (set the bit to enable X2 feature)
- switch T1X2=0 (reset this bit to select X2 mode for timer 1). Now use next values:

SMOD=0; TH1=255.
Calculate:
UART baudrate = OSC/(32*6*(256-TH1))
11059200/(192*1) = 57600;
No problem... What is wrong for you to use T1 in X2 mode and still have 56k?

Good days!