Save , Save and Stay button Problem

[abhi.globalistic]

Hi, There are 2 modules which use same hook. actionproductupdate to save data into database. when save or save and stay button is pressed from the product gui page . when i use enter data into my respective module and press save.. its fine and gets saved into database.. but when i save data in any other fields like information  and i press save button.. my custom module save is also getting called. and its incrementing my module database table id.. 

does any one face this issue.. please respond

 

Ex - information tab

       seo tab

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mymodule tab.