B737 Captain reported non-compliance with an MEL was discovered when arriving at destination airport.

Narrative

During preflight planning; I read the valid Maintenance Release and saw a write up that was worthy of further review. The write up was a cleared write up that is normally seen as an auto-generated write up associated with MEL XX (A Hydraulic system quantity indication - flight deck). However; there were no MELs on the Maintenance Release. I called Maintenance Crew for a consult. He explained to me that the write up was cleared simultaneously with the MEL. The primary argument was the fact that the MEL was not on the Maintenance Release and it was a valid Maintenance Release. Additionally; the A hydraulic system was indicating normal. Based on those two facts; I accepted the aircraft. After arriving in ZZZ; I checked hydraulic system A. It was not indicating normal (RF 65%). Additionally; the auto generated write up appeared again breaking the Maintenance Release. I called ZZZ MX (Maintenance) they said the MEL was cleared improperly in ZZZ1. I am not sure what that means. But it seems to me it is likely that the Hydraulic system level was checked IAW MEL XX. But the MEL was signed off as cleared instead of complied with.