To apply two 2go styles as one, first login to your 2go » Settings » 2go Styles, download or apply the first style, locate the second style you want to merge with the first one, you know that downloading of style on 2go reads in Percentage (%). So while downloading the second style, you'll quit or close your 2go application immediately it reaches 66%.

Now open your 2go application, the two 2go styles will now be merged as one, It's Fun.