your msheetdir is clearly not set up correctly
first quote from first post
7. only needed if WDLXTV version is < 5.1.4
Now that your MSHEETDIR has been populated, you must delete your sheets located anywhere else on the system
This is very important that you do not have duplicate sheets located anywhere else, if you do next time you reboot linksheets will corrupt your MSHEETDIR rendering it useless Again Step 7, Not Needed on WDLXTV version >= 5.1.4
if it begins scanning when you first access drives/shares, this should only be long enough for to realize that you have no sheets on your shares
if you have sheets on your shares, this just corrupted your MSHEETDIR
also MSHEETDIR, when it's working, displays all sheets, instantly, no scaning