"Status" is the status of that specific membership record, "Current Status" is the status of the member.
Status will always display the status for the specific transaction you are viewing. Current Status will always display the status for the most recent Membership Transaction for this specific Constituent.
For example, we are currently in the year 2020 and I am a member who purchased a 12-month membership on 2/1/2019. I then purchased a renewal on 2/1/2020. On the 2019 record, my "Status" would be "Inactive”, and that membership has expired but my "Current Status" would be "Active" as I have purchased a new membership that is currently "Active".
You can always select Summary so that each member has a single row rather than the details of each purchase.