Agree, it can be confusing. However, the translation follows the same format on the right as the word order on left; so expanded, this means: Aimer bien (To like); Aimer beaucoup (To like a lot). This pattern is followed pretty consistently throughout the lessons. In the lesson, it is explained that 'aimer bien' is used as an expression that softens, reduces or lessens, the degree of liking, rather than increasing it, whereas beaucoup does just as you would expect, and enhances the meaning; neither reaches the level of 'love' for somebody (Aimer trop fort), or adorer.