Not sure if this is a bug, or something I did wrong ( probably the latter

)
Noticed a few sequences with malformed xml tags eg:
<comment/>
instead of:
<comment></comment>
Reason I was looking at code was the sequence was showing in xSchedule / Check Schedule as using twice as many channels as are configured to be sent out.
I recreated the sequence by creating a new sequence and mapping the previous sequence (great tip @keithsw1111 ) All the malformed xml tags were fixed. This also fixed the additional channels issue.
Question is - how did the malformed tags get there?
If it's a bug, could it be fixed please.
If it's something I did wrong, could you let me know so I don't do it again.

Note: sequence ran ok from xschedule ( a credit to the programmers )