Charlotte Hornets: Tempo 102.3, PPG 113.7, PAPG 104.0
Memphis Grizzlies: Tempo 99.1, PPG 105.4, PAPG 106.2
What this tells is is that Charlotte plays faster, but allows fewer points per game than Memphis. Fewer points on more possessions = better defensive efficiency. You don't even need to do the math on that.
Charlotte Hornets: OEFF 116.3 DEFF 106.3
Memphis Grizzlies: OEFF 104.5, DEFF 105.2
Memphis has superior defensive efficiency? The team that faces fewer possessions but gives up more points is the better team on defense? Of course not.
It appears the game is doing the math for OEFF and DEFF backwards. Since Charlotte plays at a pace above 100, their OEFF and DEFF should be lower than their PPG and PAPG, around 97.8% of each. Instead, they are both higher (102.3% of each), because the game is dividing the PPG and PAPG by (100/102.3, or 0.977517) instead of multiplying by that figure.
This holds true for every team - teams with a pace above 100 have OEFF and DEFF higher than their points scored/allowed; slow teams have OEFF and DEFF lower than the same. Since OEFF and DEFF are supposed to measure points scored/allowed per 100 possessions, this is obviously incorrect