mobile device menu acting weird

Hi, could i please have some help to fix the mobile menu. At first load you are able to see the menu properly (for 1 second or so) then the black background is overlaid ontop (can it be pushed to the back so that the buttons are visible? - Screenshot - (TOP MENU)

Also i don't really need the (BOTTOM MENU) bar is there a way to disable it ? or hide it from mobile devices please?

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Please dont post any brand related information/ screenshots or domain links as i have had issues with google caching this information and linking it to their google searches of my site ... very bad for brand... please use temporary image upload / tiny url / pastebin etc to mask this information.