Lost 2 levels overnight

Last night my buddy and I went on a sizeable winstreak in duos, hitting the xp cap and got off. We ended at level 187 for him, and 185 for me. We logged on today and have lost 2 levels, he is now level 185 and I am 183. 

Attachments are for my buddy as he has recording software to look back at. Image 1 is the last game we played last night (can see UTC time at top), image 2 is today. His account is OhhCheech.