During this QSO I discovered a 2nd bug: 

As can be seen above the time (UTC) is given at odd minutes (eg. Marco's 21:40 - 21-42 transmission is reported 2141). This because the time is taken at the moment of decode. 

For JT9(-1) this is not an issue, because decoding is in the same minute as the start of transmission, but for JT9-2 and JT9-5 it is because it results in a wrong calculation of the cycle (1st or 2nd). As the wrong cycle is given SlowJT9 will transmit in at the same cycle as the station you received, very inconvenient!

I will fix this big after the weekend (sorry, to many other obligations on Saturday and Sunday).

For the time being the workaround is rather easy: if you get a decode you want to reply to (by double clicking on the call) just change the cycle manually (click once on the "TX 1st cycle" checkbox). The good thing is you have plenty of time to do so as there are 20 seconds between the end of a transmission and the start of the next cycle. 

To end with a positive note: during Marco's 2152-2154 transmission there was very deep QSB and his signal dissapeared from the waterfall display for almost 1 minute. But despite that still a good decode, just some dB weaker.

​73, Rik  ON7YD - OR7T