Hi Watty, it's seems a bit odd but who knows? Do you have quails etc in aviary as well? Are you sure it's budgie eggs, if you only have budgies it's strange they would pick the floor if there are nest box's available.
Have they made a nest or just on the ground? If the eggs have been rolled around a bit they could be addled and no good anyway, a lot of things come into it age, breeding condition, etc. How conversant with budgie breeding are you, e.g. first time or have you been breeding before this?
A bit more info could help other experienced breeders give you advice.
hi robyn, just for some more information, the log that they are nesting in is actually on a shelf about a metre from the ground. and there are no other birds living in there except them. also before they laid these eggs they had laid more before, but another pair destroyed them.