Avatar or Expansion of Krishna: Maha-Vishnu

                                                                  Q. (Based on the following references) How to reconcile the "gradual evolution" and the "simultaneous creation" explanations? I'm aware of the soul moving upwards through different species of life. It seems that Srila Prabhupada also says how there is a sequence and time factor of evolution from lower developed bodies into more complex forms. And then again he says that all forms come up simultaneously at once.

                                                                  Some excerpts from Srila Prabhupada's writings:

                                                                  Q. Krishna says in Bhagavad Gita that He is Kala (Kalosmi). So time is eternal. But when we practically speak ("In due course of time, time will answer" etc) it apparently looks as though time changes. Please clarify how to understand this?

                                                                  I have gone through several websites for 'DASAVATAR' (ten incarnations), and there is a confusion whether Lord Krishna is an avatar or Sri Hari (the original Supreme Lord) Himself Who came down on earth. At a few sites Krishna is shown as an avatar and Balarama also as an avatar of Ananta Sheshanaag (also Lakshmana); while on some others Balarama is presented as avatar and they treat Krishna as Sri Hari Himself, the original Avtari, not an avatar.

                                                                  Q: May I be blessed in knowing which is more ancient - The Shiva Puran or The Vishnu Puran

                                                                   
                                                                  They are equally old! Both are compiled by Veda Vyasa.

                                                                  Q: In the Introduction of the Krsna book (paragraphs 3 and 4), the following is stated. (Ellipsis are mine):
                                                                   "... when the Lord descends, the incarnation emanates from Viṣṇu. ... when Kṛṣṇa appears, all the Viṣṇu expansions join with Him. ... Kṛṣṇa actually appears in order to demonstrate His Vṛndavana pastimes and in this way attract the fortunate conditioned souls and invite them back home, back to Godhead. The killing of the demons in Vṛndavana was carried out only by the Viṣṇu portion of Kṛsna."