Just from an outsider looking in from what I have read here, it sounds like either a little bit of data corruption with unique identifier numbers not matching or a new update that went a little south as the queries sounded like they were a little mismatched, or it also could be new or modified screens having errors connecting to the back end. I have had to clean up small data bases with corruption and thank goodness for back ups, but one the size of the VA is huge and a ton of queries to locate even perhaps one small area can take some time. The Vista EHR 
system is good but I have also seen others that are easier for the end user too.
Interesting how DOD and the VA have been recently discussing which system should they use as one, in other words, Vista from the VA or ALTHA from the DOD? From a programmer’s standpoint, this is like the kiss of death too to have something like this happen and it appears no patients were severely affected, but you need to have accuracy and fix the problem immediately for sure. In a situation where updates or big revisions are being rolled out, it helps to virtualize it first before going live on the real network too. BD
Department of Defense and VA to migrate health records
WASHINGTON - The top Republican on the House Veterans Affairs Committee demanded Wednesday that the VA explain how it allowed software glitches to put the medical care of patients at its health centers nationwide at risk.
“I am deeply concerned about the consequences on patient care that could have resulted from this ‘software glitch’ and that mistakes were not disclosed to patients who were directly affected,” said Rep. Steve Buyer, R-Ind. “I have asked VA for a forensic analysis of all pertinent records to determine if any veterans were harmed, and I would like to know who was responsible for the testing and authorized the release of the new application.”
Patients at VA health centers were given incorrect doses of drugs, had needed treatments delayed and may have been exposed to other medical errors due to the glitches that showed faulty displays of their electronic health records, according to internal documents obtained by The Associated Press under the Freedom of Information Act.
The VA’s recent glitches involved medical data — vital signs, lab results, active meds — that sometimes popped up under another patient’s name on the computer screen. Records also failed to clearly display a doctor’s stop order for a treatment, leading to reported cases of unnecessary doses of intravenous drugs such as blood-thinning heparin.
Veterans given wrong drug doses due to glitch - Health care- msnbc.com
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