A319 First Officer reported concerns over maintenance practices and communications issues after arriving at destination. The flight crew entered an additional entry into the log book and the aircraft was removed from service for repairs.

Narrative

Enroute from ZZZ1 to ZZZ we got an Electronic Centralized Aircraft Monitor for Flight Control Spoiler Fault. We followed SOPs and reviewed the appropriate checklists. Nothing appeared wrong. As we started to descend into ZZZ we noticed a slight buffeting. I was Pilot Flying and incrementally slowed by 10 knots to around 280 KIAS until the buffeting stopped. As we continued descending we had to slow more and more to relieve the buffeting. Below 260 KIAS and all the way through the approach and landing phase the buffeting had subsided. The Captain wrote up the Electronic Centralized Aircraft Monitor fault in the Aircraft Maintenance Log and we called maintenance to come out to the aircraft. A mechanic was promptly there and began running his tests. We were to keep the aircraft for ZZZ2 so I did the preflight walk around. I found that the #2 spoiler on the left wing was partially extended. I took pictures and showed the mechanic explaining that this was definitely related to the problem he was trouble shooting. He told me 'It's supposed to look that way while I'm running this test.'; which was obviously a lie. No other flight control surfaces were moving or partially deployed while I was doing the walk around. The mechanic didn't even bother to come outside and look at the partially deployed spoiler I told him about. He signed off the Aircraft Maintenance Log as some how the Multipurpose Control Display Unit test he ran passed with no faults and told us we were good to go all while the left #2 spoiler was still partially deployed. The Captain and I both argued with the mechanic for a good five minutes until we decided to make an additional write up in the Aircraft Maintenance Logbook after he erroneously cleared the first one. I then filled out the Aircraft Vibration Report in the on line App. The aircraft was then taken out of service and we departed for ZZZ2 2 hours late with a different aircraft.Flight control malfunction that had previous history as evidenced in the Aircraft Maintenance Logbook from 2 days prior. Also mechanics that are reluctant to do actual work or take pilots seriously. Line Mechanics should take flight control malfunctions more seriously and listen to us when we tell them what we experienced. Mechanics also need to stop pushing for pilots to accept non-airworthy aircraft. In retrospect perhaps we should have included more information in the original Aircraft Maintenance Logbook entry besides just the Electronic Centralized Aircraft Monitor fault but at the time we did not have any flight deck indications that a spoiler was partially deployed.