Will be the indexing limits, specified in robots.txt, taken into account during indexing?

This is optional. If this option is ticked, generator will follow the Allow and Disallow instructions in general section of User-agent: *
«Personal» sections of User-agent: Google or User-agent: Yandex are considered when choosing the appropriate crawler identification type as search robot.
In addition, you may create section User-agent: Mysitemapgenerator, which will be taken into account when choosing the direct identification of our robots (Mysitemapgenerator-HTTP or Mysitemapgenerator-Mobile - for Sitemap mobile).