No need to re-rip if you have lossless files.
Select all the files for one album in the Files list
In the Action Window > Tag, check each of Album, Artist; you can also look at Date, and Genre.
If all the values are the same for any property (eg. Album, Artist, etc.), MC will show the value. If any are different, it will show [Varies]. When Album or Artist varies, MC's default Album views (and other views that group this way) will split the tracks as per the values in the property.
If none of the values is correct, or are empty, you can try to cull the information from the folder and file names of the tracks. Right-click the tracks, Library Tools > Fill Properties from Filename, and configure a "template" that matches how your tracks are located/named in the file system. MC can then grab these values and fill the tags/properties. Example:
Folder: [Artist]\[Album]
Filename: [Track #] - [Name]
If none of this will work for your situation, let's go to the next step...