I have a mega menu on www.over50choices.co.uk when you hover over it, it shows category & sub-category page levels which could be giving the customer too much choice?

In addition, i have noticed that when i do a Google KW Planner Tool landing page search on any of my pages, the results show the first one or two KWs that are targeted but then it shows KWs for the whole of my site - is this confusing google what my page is about and therefore losing focus and juice?

Is the latter being caused by the mega menu and can i change it so that google only sees one page at a time?

Thanks

Ash