Differing opinion polls ?

Found two opinion polls on the net for Uttarakhand Polls :

First is   : http://itvnewsindia.com/opinion-poll-%E2%80%93-uttarakhand

Seat Projections:

Congress is projected to win 31-35 out of a total of 70 seats in Uttarakhand, while BJP comes second with a projection to win 20-24 seats, the pre-poll survey report said.

Seats Projection Range
Rank	Party	Projected seats	2007	Min	Max
1	BJP	22	34	20	24
2	INC	33	21	31	35
3	BSP	9	8	7	11
4	UKKD	2	3	0	2
5	Others	4	3	3	5
Total	Party Seats	70	69

Second is :  http://www.newsbullet.in/india/34-more/24967-STAR%20News%20Opinion%20Poll:%20Cong%20wins%20Punjab,%20BJP%20in%20%20Uttarakhand

"In Uttrakhand, where BJP had 35 seats in the outgoing house, is increasing its tally to 39. This is against expectations that the party would do badly in face of serious charges of corruption against the government and the party had to replace the chief minister Ramesh Pokhriyal Nishank with Gen BS Khanduri. Though Congress is getting only 29 seats, it is still up from its last time’s tally of 21."

How does one believe these surveys and opinion polls!!