Pls dont worry. Your tkt is confirmed in a composite coach consisitng of part 1AC and part 2AC. Your accommodation will be in 1AC half and most probably in Cabin A. Normally cabin/seat nos. are not displayed in the tickets and will be known only from te charts posted at the stations in the display window/coach. Looks like you have been allotted Cabin A but pls check up the coach chart before boarding.