Playin of Hungarian Rhapsody no.2 - need guidance

[tenesious]

Hello ladies and gentlemen, I am having some difficulty in play this part of the melody, the ones that I play sound so different from the professionals... as if I am playing other music.

Starting from the sempre leggierissimo-

1). Whether I play single or double hand the melody sound so detached and it sound totally so wrong

2).How should I play the appoggiatura that leads to the D# for the left hand; squeeze everything into the first note of the 3rd group of demi semi quaver(right hand - treble clef) - B#, that is right after the 2nd group  of demi semi quaver(right hand - treble clef). If this is not the case how should it be done?

I need some advice or guidance for this music, Thanks you!!!
Please pardon me for the ignorance of these musical knowledge.