Channel 20 poll is only one of 4 that has Yachad party making the 4 seat threshold.
http://www.israelnationalnews.com/News/Flash.aspx/320927
Eli Yishai ‘Very Close’ to Threshold
Channel 1 says Yachad a few thousand votes away from entering Knesset, Channel 20 has it entering; Chetboun: ‘we will make it.’
Eli Yishai’s Yachad - Ha’am Itanu joint list with Otzma Yehudit is on the edge of the recently raised threshold percentage, with Channel 1’s pollster Stella Karayov saying it’s a few thousand votes away from entering the Knesset.
Three of the exit polls at larger and generally more left leaning channels (Channels 1, 2 and 10) show the party falling short, while Channel 20 has it getting through with four mandates.
http://www.israelnationalnews.com/News/News.aspx/192792