Weapons dissapearing / backpack not saving?

[killroth 9]

Date/Time: june 14 4am cst

What happened:my mp5sd and m9sd dissapeared from my back pack only to be replaced by the items that were in my back pack an hour before i stopped playing last night.

Where you were: airfield - undisclosed location

What you were doing: looting airfield and running far away for an hour

*Current installed version: beta version arma2 and 1.7.0 Dayz

*Server(s) you were on:TX7

*Your system specs:i7, windows 7, geforce graphics

*Timeline of events before/after error: raided airfield about 4 am CST eventually logged off about 5:20 am CST, when i logged on this morning at 11 am CST my items had reverted to 4 am? server didnt save?