Disappearing Records

Early records in my database are disappearing.

For Example, in the attachment, location number 211 originally had a starting gallonage on January 1, 2017 of 59.45 gallons. This is occuring with many of my 2015 and 2016 wines.

I have reviewed my code and re-entered the data several times. This problem is recurring but I do not see the pattern.

Orginally I though the database was cleaving earlier records to make room for new records so I paid for more records to avoid this.

In any case, cleaving older records is not a solution if this is the case.

Please help me correct this as it is causing much wasted time.

Thanks,

Jeff