Fathom,
The CS 33 LLZ DME was made to read the same as the CS DME to prevent moron pilots from conducting the 33 LLZ approach using the wrong DME! The 2.6nm difference would put an aircraft 820' low if the wrong DME was used. Saving us from ourselves!
If the chart limitations and profile for the 33LLZ were based on the closest DME ie at the threshold of 33, then "morons" would be 820ft/2.6nm high, not low, if they used the wrong (in this case CS 113.0) DME, would they not?