Add some markets ?

Sorry but I'm not meaning to be a pain asking lots of questions. I just seem to keep hitting a brick wall when trying to do basic things with Time Machine.

About a month ago I purchased a full month's worth of data for Greyhound races - quite a large database.

Then a few days ago I was interested in Horse Racing so I purchased just 2 days of data to test some ideas. When I click "download purchased" it seems I have to download all the data I have ever purchased. I assumed I could just download the data I had recently bought and it would add to the data I already had? this seems a bit inefficient.

Anyway my problem now is I have some Horse Racing events in "All Markets". I've selected some by ticking the appropriate boxes. I can see the ones I've selected on "My Markets". But the timeline at the top still says "Add Some Markets". Try as I might I can't seem to get Time Machine to run these races. I've tried resetting, restarting, started over several times. The events are in "My Markets" but won't seem to add to the time line at the top.

Am I being dense ? screen grab is attached.

I don't know if it's relevant but when I tried to download purchased markets, and was forced to download thousands of markets rather than just the ones I had just paid for, I left it running and it came back with an error. There was a problem downloading one of my markets. I had a prompt to download a log for support. Here it is.

Monm / A3 480m, ID: 136676678

I've tried downloading again but get the same result.

I'm not too concerned about missing one market but I'd like to be able to run the ones that did download.

Thanks,

Dean