RTTY is set to RTTY.
in fact it works RTTY from 7040 to 7050.
But for a Spot on 7090 (that is LSB) with "RTTY" as Comment, the radio does not go in RTTY but goes in LSB.
This is why I asked to "better" take care of the radio Mode from the DX Spot comments.
Obviously, if the Spot on 7090 does not have a Comment, it's Ok to go on LSB.