I'm not seeing the conflict here:
•Your spouse files for his/her retirement benefit to begin 7/2018, at age 63 and 6 months. (Monthly benefit: $763) This is allowed because your spouse can file for benefits on his/her own record at any eligible age. He/she cannot file for spousal because you haven't yet filed for your own benefit.
•You file for your spousal benefit to begin 7/2018, at age 66 and 2 months. (Monthly benefit: $464)This is allowed because you turned 62 prior to 1/2/2016, so you are allowed to file for spousal without being deemed to file for your own benefit too.
•You file for your retirement benefit to begin 5/2022, at age 70 and 0 months. (Monthly benefit: $3,536, replacing your spousal benefit)This is allowed because you are of age and did not claim your own benefit in 7/2018.
•Your spouse files for his/her spousal benefit to begin 5/2022, at age 67 and 4 months. (Monthly benefit: $412, in addition to his/her monthly retirement benefit)This is allowed because now that you are collecting your own benefit, the spousal benefit has become available to your spouse.