Here my suggestion:
Google indexed 1930 peges from your site and only 280 of them Google crawl all the time. The rest 1700 pages became supplemental (it mean that Google crawl it once in 2-6 months). Google don't really like to give top positions to supplemental pages.
Many links you have from link farms... like this one:
http://all4-car-accident-attorney.in...ture-store.htm Who did it! Kill person who promoted your site. Google hates for this stuff.
Many backlinks from not related sites!
What should you do:
Find pr6-8 furniture / home / family related sites and subscribe for textlinks. It will cost you From $100 to $1 500 a month to get 3-10 homepage sponsored links. Decide with budget and subscribe for 2-3 monthes. Check result later and decide if you make profit or it waste for money.
Content:
To avoid supplemental results you need more links from trusted sites.
On this page
http://www.furnitureforsale.com/namiquslchan.html (like all other pages) I can see picture of product, metatags and just 10-15 words with product description. It is wrong! You need rich content for each item. Something like this
"Affordable large Navy Microfiber Queen Sleeper, Chair and Ottoman Group. One of the most popular product in our store preffered and awarded by customers. You can order it and pick your own colour (black, white, green, brown, yellow, purpule etc.). It will fit perfect your room, hall, office. Large and comfortable. Fast shipping."
This content will give you a chance to pick customers who type "Large black sleeper with chair" , "Queen sleeper for room", "Affordable sleeper" etc...
Unique rich content should be on every page for every product.
Good luck.