kodi has a known minor bug (it may happen with Kodi 15, 16, 17)
sometimes when you open/run a repo addon,
you will not see any updates there... nothing changes there
although the author said there is a new update addon is available in his repo
in order to solve the issue, you may have to:
- open settings | add-ons | My add-ons
- move the cursor (mouse) to the left, until you see a pop-up info/options
- then click: "CHECK FOR UPDATES"