@RonAus : Hi . when U prevent Guests to view some pages , google bots get errors that they can't access to the page . All pages error for Lack of access is same together and google bots think you have many pages with same content!
This problem is like "Spammer sties"!
briefly : When you prevent Guests to view topics, when they try to access topics they view a error. this error showed in all limited topics . When google bots try to access this limited links , they see alot pages with same content .
Then u marked for "Spammer Site"
One of the resolve this problem is : u must make limited links "REL" as "nofollow"!
this is hard and i don't know how you can change
rel="nofolllow"
for some links in some categories!
So this is better You remove this limit and save your SEO and popularity in Google results.
@adesh1414127033 As you know, when Google Bots try to index a site with Crawling in links in pages , this Crawl has a specific time!
The other problem is crawling indexed previous pages without grading specified!
The Sitemap.xml page is a good page for Google Bots that they know The importance of links and percent chance of getting their content!
Sorry for my English guys 

@RonAus : Hi . when U prevent Guests to view some pages , google bots get errors that they can't access to the page . All pages error for Lack of access is same together and google bots think you have many pages with same content!
This problem is like "Spammer sties"!
**briefly** : When you prevent Guests to view topics, when they try to access topics they view a error. this error showed in all limited topics . When google bots try to access this limited links , they see alot pages with same content .
Then u marked for "**Spammer Site**"
One of the resolve this problem is : u must make limited links "REL" as "nofollow"!
this is hard and i don't know how you can change
````
rel="nofolllow"
````
for some links in some categories!
---
So this is better You remove this limit and save your SEO and popularity in Google results.
---
@adesh1414127033 As you know, when Google Bots try to index a site with Crawling in links in pages , this Crawl has a specific time!
The other problem is crawling indexed previous pages without grading specified!
The Sitemap.xml page is a good page for Google Bots that they know The importance of links and percent chance of getting their content!
Sorry for my English guys (:| :D