Hello and welcome,
first of all you didn’t provide information which base, neither the name nor the ID.
Please see here for proper info ( READ FIRST: Will You Receive Support? - Yes or No )
So I hoped you used the same forum name as ingame name so I could crawl your structures dependent on your name and then matching the ID and then the type / time you are talking about.
You see, that is a lot of overload. (But thanks for using the same name here.)
Anyways if you speak of these BAses
You see you created two times a base which is below 10 blocks big. That is by definition the reason to trigger the system Decay time.
More information about wipes (in the Guide and ingame by pressing F1 > Knowledge Base)
DecayTime: 7 hours ( Time after which player-built structures without core or less than 10 blocks get removed when not visited )
TL;DR: build a larger base (10+ Blocks big)
RexXxuS