Sydney Menu & Older Posts

I love Sydney but wonder why there seems to be a monthly update. Quite frustrating.

I am running WP 4.24 and thought I updated yesterday to Sydney 1.19

Anyway, in the process, the header menu background color went from transparent to blue. There is no option to make it transparent in the custom settings and I had it before. How can I get it bacK?

Also, when someone does a search on my blog, only the most recent 5 posts come up. How can I get an “Older Posts” link at the bottom of the search list? I thought it used to be there in older versions.

Just curious, what’s new in 1.19 and why is this theme updated so frequently?

Thanks for the help,