Derek Wills wrote:

There's another strange 'cluster spotting' phenomenon that I don't
understand at all. Tonight, LZ4UU was on 40 cw sending his or her
call frequently. There were 4 consecutives spots for LZ1UU (not 4)
on exactly the same freq (7001.5) at 0211, 0217, 0219 and 0220 UT
by four (apparently) different people. The station always sent 4,
never 1, while I was listening. How does one explain that?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Easy. Using a telnet program like SpotCollector, if you double click on
a bad call in order to QSY to that call, the bad call gets pre-entered
in the "Outgoing spot" box. Unless you notice the error, the next spot
you make will have the bad call.

The next question is why anyone would re-spot a call that's just been
spotted and for that, I have no answer.

73, Bill W6WRT