My question: I know this can be done on Betangel, only because I just saw a video about this... and I know this isn't the Betangel support site.

How do I back at a specific price? e.g. I want to back a horse at 1.2 but the current price is 4.9
If I click in the blue cell to the left of 1.2 in the ladder view, I would expect my $50 stake to be placed at 1.2, but instead BA places the $50 as a back bet at 4.9
Am I missing something fundamental here?
Thanks in advance.