I think you can fetch 14 article in the first block with NumberOfValidItems 4, and then, the reste 10 article will auto added into the second block.
In this case, you must create a FetchClass with . Like this :
[block1]
Name=block1
NumberOfValidItems=4
NumberOfArchivedItems=0
ManualAddingOfItems=disabled
FetchClass=fetcharticles
FetchFixedParameters[]
FetchFixedParameters[Class]=article
FetchParameters[]
FetchParameters[Source]=nodeID
FetchParameters[Depth]=2
#this return 14 articles, so 10 article will added into the block 2 !!!!!!!!!!!!!!!!!!!!!!!!!
FetchParameters[Limit]=14
FetchParametersSelectionType[Source]=single
FetchParametersIsRequired[]
FetchParametersIsRequired[Source]=true
FetchParametersIsRequired[Depth]=true
FetchParametersIsRequired[Limit]=true
ViewList[]=ttt
ViewName[ttt]=tttttt
#Time for change the block after the crontab ezflow passed. TTL=1800