TX5 and not TX4

Tx5 (regular 73 message) is used when You got a RRR or RR73 from other side and You not sent 73 like message.
tx 4 can be RRR or RR73, if You sent RR73 then by default tx5 will not be sent anymore.
In short if You want always tx5 to be sent during QSO You should enable sending RRR (not using RR73)
Second point You should change default 73 message to HNY every time QSO is already in progress. In future version of this is not needed, once selected tx5 message will be stay active.
Other point is that many programs (also jtdx-s autoseq until 158) were not accepting HNY 73 message as valid greeting for completing qso.
HNY
Regards,
Arvo ES1JA