Hearthpwn

I'd like to add on that I'm also having the exact same problem - only 5 pages of neutral cards are showing up. I've done a fair bit of troubleshooting to try to resolve the issue but have yet to find a resolution.

I tried uninstalling and reinstalling both Hearthstone and Innkeeper. Once Innkeeper and Hearthstone were uninstalled I cleared all of the relevant data in the Local, LocalLow, and Roaming folders in the %appdata% directory for BOTH Hearthstone as well as Innkeeper. This did not resolve the issue.

I switched my battle.net launcher to open hearthstone in the EU region and the missing neutral pages reappeared but as soon as I changed back to my NA account and resynced the collection, I was back down to 5 pages. 

I also tried creating an entirely new account on Hearthpwn. Once I synced Innkeeper to the new Hearthpwn account, the new account was also limited to 5 pages of neutral cards. 

What's most interesting to me is Hearthpwn does have the data stored for my collection in the database as the counter at the bottom of the page does show I own 1082/1097 Neutral cards. Based on this, it appears to be some sort of display bug on the site, not an issue with Innkeeper or Hearthstone.