Thanks for updating robots.txt

# Be kind. Wait between fetches longer than each fetch takes.
User-agent: *
Disallow: /bare/
Disallow: /mobile/
Disallow: /*?displaytype=
Disallow: /*&displaytype=
Disallow: /*?node=Super+Search
Disallow: /*&node=Super+Search
Disallow: /*?node_id=3989
Crawl-Delay: 20
[download]

But as I already said, you are forgetting the very common semicolon

Disallow: /*;displaytype=    
Disallow: /*;node_id=3989
[download]

Personally I'd simplify and skip all ; & ?

# Be kind. Wait between fetches longer than each fetch takes.
User-agent: *
Disallow: /bare/
Disallow: /mobile/
Disallow: /*displaytype=
Disallow: /*node=Super+Search
Disallow: /*node_id=3989
Crawl-Delay: 20
[download]

The only problem I see are IDs starting with 3989 etc (e.g. 39895)

So probably better:

Disallow: /*node=Super+Search$
Disallow: /*node_id=3989$
Disallow: /*node=Super+Search;
Disallow: /*node_id=3989;
Disallow: /*node=Super+Search&
Disallow: /*node_id=3989&
[download]