Why is google automatically showing my competitor's result even when customer types in our brand name on the query?

[Gaadi]

This is little weird. We run a website specific to mobile phones called as 91mobiles.com. The site has gained lot of user interest and trust in the last 2 years [pre-dominantly indian users]. Lot of our users type mobile phone model and 91mobiles as the query. Example "Sony Xperia P 91mobiles". Google is showing gsmarena.com results on top and then shows our own results below! What's annoying is the fact that google also bolds the term gsmarena [denoting that it's a synonym]. Any idea why this is happening? We are very sure that we are not doing anything wrong..We have worked really hard for the last 2 years to reach where we are..and it's kind of hard to see gsmarena siphoning away our traffic for no reason at all [even when customer types in 91mobiles a part of the query to quality it]...Can some experts here demystify this? Thanks.

[Aeronet]

I noticed something, when I went to do the search "Sony Xperia P 91mobiles" Google suggested "sony xperia p gsmarena".

Since Rand did a test to prove that it was possible to influence those suggestions ( http://www.seomoz.org/blog/how-googles-search-suggest-instant-works-whiteboard-friday ) , maybe they tried that to steal a part of your trafic ?

[Gaadi]

Probably, but why would google highlight the word gsmarena?

We roughly get around 1,500 brand searches [people searching with 91mobiles as the keyword]. All I am asking is that when people are clearly specifying the intent by adding a keyword 91mobiles as part of the query, why would google don't honour that..isn't that a bad user experience?

I am very sure this is a technical issue which can fixed. But I am not sure how. SEOMOZ Experts can you please help?