I am able to lock Emirem TV on 21537H or thereabouts if I'm very careful to choose the right spot in Spectrum Scan.
Much easier to use Blindscan, but there are unintended consequencies, namely a multiple lock of some frequencies.
In the example shown, Emirem TV 21537H is found all the way from 21528H to its true frequency. Much the same with Canal 2 0n 21576H, which is found in several locks up to 21583H.
EBSPro Blindscan correctly identifies only the true transponder frequencies. Blindscanning in both cases is in 1 MHz steps.
Not sure why updateDVB is acting like this, maybe needs an increase in step size (can't see a way of changing this).