As Probate for Joseph COOPEY took place decades after his (death 21 March 1833) -? is the burial of Joseph COOPEY at Churcham 25 March 1834 age 46 - (c1788) your line? - the month is correct, he would have been buried a few days after his death, it's just the year that's out by 12 months.

Have you seen on the 'net' an extract from the Berrow's Worcester Journal - outlining the events September 1783, when 'Mr John COOPEY of Churcham, in the County of Gloucester, was robbed by a man' who had hired himself as a servant under the name of John Jones

Tried to do the link, but can't - if you google the highlighted sentence above, this brings up the article (Newpaper Transcripts) or 'Coopey Grazier Churcham'

'On Sunday night last the house of Mr John Coopey of Churcham, in the county of Glocester, grazier, was robbed by a man who had hired himself as a servant, under the name of John Jones;and who rose in the night, opened the door, and introduced another person into the house, armed with a knife and an ax, demanding his money; and opening a box they took out £91 8s. 6d * in three purses, two of which were made of leather, the other of canvas; they took also a silver watch marked J.C. both on the outside and inside; three silver buckles, a hat, and other wearing apparel, particulary three shifts belong to a servant. At Ledbury on Monday, Jones bought a chain to the watch, a new coat of a dark mixture, and a new pair of leather breeches'

followed by:

William White a tanner at Newent, in that County, charged on violent suspicion of murdering Frances Barnes, who kept the Sun public house in Newent.

FOD records - Burial at Newent - 12 September 1783

Frances BARNES - Burial, Murdered - Memoranda : WIDOW

and FOD records, Marriage at Newent 20 January 1783

William WHITE JNR, (occupation Tanner) married Ann HOOPER, Spinster, at Newent, by Licence

witnesses Wm HOOPER and Sam WOOD Jnr.

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So, the Berrow's Worcester Journal, seems to have reported events in the FOD.

* how much would that be in today's money?

this website starts at 1830

http://www.measuringworth.com/ukcompare/index.php (and in 1830 this would equate to £7,230)