yes John 2 is at the beginning, when the other records of cleansing are at the end.
well , i don't know for sure , what is sure is that sanctification is an ongoing process. When we stop walking , we go backwards and weird stuff creeps in.
In 2 or 3 years, a lot of stuff and compromise can creep in.
also, that could be a hint to the ministry and work of the Holy Spirit through the age of the Church , with the two comings of Jesus at each end of this age.
"Behold, I am going to send My messenger, and he will clear the way before Me. And the Lord, whom you seek, will suddenly come to His temple; and the messenger of the covenant, in whom you delight, behold, He is coming," says the LORD of hosts. [Malachi 3:1 New American Standard Bible]
I like what is being said here "the Lord will suddenly come to His temple".
When Jesus came the 1st time , the believers received His Holy Spirit who cleanses the temple, for He is Holy. We are co-workers with the Holy Spirit
the Holy Spirit Himself exhorts the believers to be ready for the 2nd coming of Jesus in power and glory. The bride will prepare herself for the Bridegroom.
And the Spirit and the bride say, "Come. And let him that hears say, Come". And let him that is thirsty come. And whosoever will, let him take the water of life freely".
We were thirsty & hungry for righteousness , mercy , truth , and purity when we first came to Jesus. Are we still thirsty and hungry ?