https://bf4db.com/banning 

Linked Accounts:

• Accounts having overlapping IP and timestamp information will be considered a linked account. Player information streamed to the Service can be used for this purpose.

• If an account is currently banned by BF4DB, all other accounts that are positively identified as a linked account will receive a ban for “Linked Account” as well. Similarly, if the main ban successfully appeals, all other alt bans will be lifted.

You were banned for linked account to that profile which was banned for suspicious stats by their site bot. 

Looks normal for a veteran to me. 

Name: Code 313

Tag: 313

Rep: Me! SuRtur

Platoon

No own server yet but we usually play on a server with our tag on it. 

The stats says it all: http://battlelog.battlefield.com/bf4/soldier/Saya_no_Uta_x/stats/1947415913/pc/ impossible spm, etc. Video proof is uploading on twitter rn.