After investigating further, it seems that there are no problems. I have made a full install of STEP two weeks ago, but I ignored the mods with broken links in the STEP 2.2.9 page (there were a few last time I checked), which explains the mod count difference between my MO and this list. (Also, there is still one like this: Telvanni Reborn) This, combined with the update date of the page, led me to a conclusion which seems to have been a bit too quick... Sorry for the inconvenience!