Give it up already. Why is this obsession with Madara? Are you saying Madara is stupid? Consider these facts, will you?
1. Akatsuki's member were looking for all the tail beasts where abouts in about the time skip (fact)
2. Madara waited for a long time to control the 9 tails. (fact, he said so, not me)
3. Madara said he wanted to destroy Konoha. (fact, he said so, not me)
4. There are quiet a lot !!!??? in Madara's portions in chapter 502 & 503. (facts) Must we explain it to you what is the meaning of !!!??? in a manga?
5. Madara has lured Minato away from the 9 tails. (fact, he tried to finish Minato quickly)
6. Madara said Minato can injured him and release the 9 tails in one move (fact, he said so, not me)
I think I must explain all the points above in plain English so there won't be any misundertanding.
Madara's intention for controlling the 9 tails and had it attacked Konoha was for complete destruction of Konoha. He has not been planning to extract the tail beasts from its host, hell no Akatsuki has not been formed, maybe Pain has not mastered the rinnegan yet so it means Madara has not met Pain yet. No Pain no extraction. If anything his failure at Minato's hand inspired him to form Akatsuki and came out with the extraction idea once he met Pain. Madara is a smart and patient man and also outstanding strategist.
Let's pretend I were Madara, so you suggested I would do something stupid like, it's not good if Kushina was the host let's force Minato to seal the 9 tails into his son, and lost half of the 9 tails power in the process, and hopefully I could get rid of Minato. After accomplished all those and successfully alerted Konoha of my existence and purposefully injured myself then let's find the other 8 tail beasts 13-14 years later and in total I'll wait for 16 years to get my hands on the 9 tails. Brilliant!!!!
"back then...he saw through everything I did," of course Madara did, if not he is really stupid. Before his attack he had all the infos about Minato's jutsus, he planned all the possibilities of Minato's reaction and be prepared. What Minato meant was just for the 1st of their encounters (not all the time), that's why we didn't see all those !!!??? on Madara, he had anticipated all of Minato's moves back then. That's the key to your 'back then'.