MRI with contrast

On average, how often do MRIs with contrast miss things? I had one done on my left shoulder and it just showed a low grade partial tear of the infraspinatus. No other tears or anything noteworthy. Issues are in the left upper back near shoulder blade and occasionally weird feeling near the armpit/pec area, along with hand tingles. Also get some hand tingles in the other hand but not as bad or frequent. I have a C5-C6 disc issue, which that area of the c-spine innervates the infraspinatus, making this all so confusing. I see a spine doc on the 4th. I did send my shoulder MRI with contrast to Mayo to have them read it in case something was missed by the local radiologist. They should receive it tomorrow. But...I am wondering if a second MRI with contrast should be done at a different imaging facility than the original one in case the machine missed something. I am hoping this issue is not a shoulder problem, as I already have a full thickness tear in the other shoulder that needs fixed after the holidays. The way the left shoulder feels is nothing like that one. The discomfort near the shoulder blade and weirdness is much worse. Aches when lying on my back but that's the only way I can really sleep. Shoulder doc isn't convinced it's a shoulder issue, same with the physical therapists. They suspect neck. I can't help get that idea out of my head though since that used to be my bad shoulder. I was shocked when the other one showed a full thickness tear. I would never have guessed it. When I was at Mayo for my PKD/PLD the first of the month I was able to see someone in the physical rehabilitation department. She looked at my cervical spine MRI and did in office tests. She could not pin point the issue either. She suggested I have an EMG and then additional possible other steps would be a cortisone injection into the shoulder (had that done once back home and it did not help), trigger point injection, etc. I imagine the spine doc I see soon will want the EMG as well. For the hand tingles. the Mayo doc said it could be a separate issue, possibly carpal tunnel. The area of tingle does not really follow that though. Anyway, long way to bring it back to my original question...should I find comfort in the shoulder MRI with contrast I had done or, if the spine doc can't find a correlation to my C5-C6 issue and the shoulder, do I ask for a new shoulder MRI with contrast but at a different facility? Thanks for letting my share my exhaustive story. The unknown and waiting to see the spine doc (2 ½ months) is draining and causing anxiety.