Brainsurge- Knockout Rounds with the same pairs (Season 1) 

Here is every episode that has the board in their knockout round have the same pairs as another episode.
107, 110, 125, and 127 are the only episodes to have the pairs in their knockout round be used only once in Season 1.
102 & 123
103 & 140
104 & 115
105, 114, & 130
106, 109, 116, & 131
108, 124, & 139
111, 119, & 134
112, 136 & 138
113, 128, & 141
117 & 132
118 & 133
120, 121, & 135
122 & 137
126 & 129