Titikei was uploaded on July 9th, but download links were made available on July 30th. The publish date in the back of the book also says July 30th as well as the Titikei forum page.
Love-Ridden was supposed to be released on June 14, but was instead made available for download on June 15. The comment section confirms this with people asking where the download links were.
The reader was updated for the second edition of Renai Sample on September 10th, but download links for that edition were available on October 15th. My topic in Feedback, Suggestions, and Support confirms this.
https://www.fakku.net/forums/feedback-suggestions-and-support/when-is-the-2nd-edition-of-renai-sample-downloadable
Also, for when you post release date for F4U, the actual release was on 11/27/15. The holiday prevented the release on time.
https://www.fakku.net/forums/books/f4u-curiosity-xxxed-the-cat/page/2