Yes, although it's hard to tell for certain. The changes I make to specific instances of the widget, or changes to the plug-in's CSS itself, do not seem to stick or appear right away.
For example, on these pages, I have successfully removed the "ul" from the CSS and added a BREAK between each post:
But, seeing that I still have a random "< >" at the bottom of each list, I've gone back into the CSS, and fixed the issue (or what I think is the issue). But in refreshing each page, the "< >" still appears. From past experience, it seems likely it will eventually work -- perhaps even later today. But it would be nice to know why I cannot immediately see the changes I make, as with anything else I do in WordPress in which the changes appear right away. I'm constantly clearing my browser's cache but that doesn't seem to be the issue. It's just sluggish I guess.
Is it common for people to experience this sluggishness? Or is there something I should check on my end?