Thanks everyone for the updates and reports! It's the start of a new week, so I'm ready to dive into this:
3neko: this is a test feature that is not yet stable. I respectfully ask with issues that are coming up (such as the 思う/想う issue), you give me the benefit of the doubt that when I say that I only want to fix the renshuu-made materials, that this is indeed my intention. I have always bent over backwards to accommodate user-choice and maintaining backwards compatibility (both with features, settings, and content) across literally 20 years of development, so the tone used in your messaging that suggests otherwise is not necessary.
Edit: I have put off this merge for *years* because I wanted to make sure I was able to develop a tool that, when finished, maintained integrity across all the variations of user data (which for a "freeform" platform like renshuu, is extremely difficult). A lot of users will (maybe in a later iteration of this tool) want merging done across all materials, so I'm trying to, from the get-go, make something that can consider and respond to all user needs.
While I have indeed made fixes/changes to the N5/N4 lists in the past, I am far from perfect (and so I sometimes miss things), and this tool covers ALL the renshuu-made lists, which expands far beyond the current jlpt lists, but the older ones, kanji kentei lists, dozens of textbooks, etc.
I should have some more news/updates later today regarding the first issue you brought up.
ぶどう: your schedule is definitely considered to be user-made - it's a bit of a "ship of theseus" issue, and so I have to draw the line at point and say what is renshuu-made, and what is user-made. For this, that line is drawn at the "added by renshuu or added by the user on the Manage your Schedules page, and *not* merged with anything else."
トンヤ - the tool is instant, so it sounds like a small bug. You mentioned 御祭り - which schedule is it currently in for you?