A record may use sides A and B while your player shows one uninterrupted numbered list. Both arrangements can be useful, but one should not quietly erase the other in your notes.
Record the printed structure
Transcribe the side labels and track sequence from your copy. If the packaging uses unusual lettering or names, preserve them rather than “correcting” them to the pattern you expected. Keep the source of the information visible.
Add a separate playback reference
Write the corresponding digital track number alongside each entry when you need it. A practical note might connect B1 with track six without renaming the printed side. Check the actual edition: another release may contain additional tracks or a changed sequence.
When returning to a listening observation, you can then find the music through either system. This matters when a liner note refers to “the opening of side two” while your digital copy offers no obvious side break. The collection record becomes a translation between arrangements rather than a replacement for the object’s own organisation.