Interval query hits wrongly

[shrestha]

Here the query that I build:

> queryText = {"query":
>         {
>             "intervals": {
>                 searchFields: {
>                     "all_of": {
>                         "ordered": "true",
>                         "intervals": [
>                             {
>                                 "match": {
>                                     "query": queryTerm,
>                                     "max_gaps": 2,
>                                     "ordered": "true"
> 
>                                 }
>                             }
>                         ]
>                     }
>                 }
>             }
>         },
>         "highlight": {
>             "pre_tags": ["<b>"],
>             "post_tags": ["</b>"],
>             "fields": {
>                 searchFields: {
>                     "number_of_fragments": 0,
>                 }
>             },
>             "order": "score"
>         }
>     }

Using the above query, if I search for "vitamin a" in a document, it returns a document containing vitamin a, but it also highlight all the occurreces of "a" or "vitamin" which are far from each other.
I have also tested with two intervals for each word i.e. for "vitamin" and for "a" but that also does not work.

Any suggestion or help is appreciated.
Thanks.