There are many stories in Puranas which could not be construed as facts. These are all Perumal’s acts. It is also said that during Krishna Avataram, Lord Krishna was able to have his progeny only due to the grace of Siva and Perumal ran away from a yagna out of fear of Siva. As per our Purvacharya-s, these are acts of Perumal. Sometimes Perumal diminishes his glories willingly as a divine act; nonetheless, we should understand that such acts will not undermine his glories.